This model represent a Chain-of-Thought tuned verson Flan-T5 on Target Sentiment Analysis (TSA) task, using training data of RuSentNE-2023 collection.

This model is designed for texts written in English. Since the original collection reprsent non-english texts, the content has been automatically translated into English using [googletrans].

For the given input sentence and mentioned entity in it (target), this model predict author state by answering one of the following classes: [positive, negaitive, neutral]

Video Overview

Model Description

Developed by: Reforged by nicolay-r, initial credits for implementation to scofield7419
Model type: Flan-T5
Language(s) (NLP): English
License: Apache License 2.0

Model Sources

Repository: Reasoning-for-Sentiment-Analysis-Framework
Paper: https://arxiv.org/abs/2404.12342
Demo: We have a code on Google-Colab for launching the related model

Uses

Direct Use

This sequence of scripts represent a purely torch and transformers based model usage for inference.

This example is also available on GoogleColab

Here are the following three steps for a quick start with model application:

Loading model and tokenizer

python

import torch
from transformers import AutoTokenizer, T5ForConditionalGeneration

# Setup model path.
model_path = "nicolay-r/flan-t5-tsa-thor-xl"
# Setup device.
device = "cuda:0"

model = T5ForConditionalGeneration.from_pretrained(model_path, torch_dtype=torch.bfloat16)
tokenizer = AutoTokenizer.from_pretrained(model_path)
model.to(device)

Setup ask method for generating LLM responses

python

def ask(prompt):
  inputs = tokenizer(prompt, return_tensors="pt", add_special_tokens=False)
  inputs.to(device)
  output = model.generate(**inputs, temperature=1)
  return tokenizer.batch_decode(output, skip_special_tokens=True)[0]

Setup Chain-of-Thought

python

def target_sentiment_extraction(sentence, target):
  # Setup labels.
  labels_list = ['neutral', 'positive', 'negative']
  # Setup Chain-of-Thought
  step1 = f"Given the sentence {sentence}, which specific aspect of {target} is possibly mentioned?"
  aspect = ask(step1)
  step2 = f"{step1}. The mentioned aspect is about {aspect}. Based on the common sense, what is the implicit opinion towards the mentioned aspect of {target}, and why?"
  opinion = ask(step2)
  step3 = f"{step2}. The opinion towards the mentioned aspect of {target} is {opinion}. Based on such opinion, what is the sentiment polarity towards {target}?"
  emotion_state = ask(step3)
  step4 = f"{step3}. The sentiment polarity is {emotion_state}. Based on these contexts, summarize and return the sentiment polarity only, " + "such as: {}.".format(", ".join(labels_list))
  # Return the final response.
  return ask(step4)

Finally, you can infer model results as follows:

python

# Input sentence.
sentence = "Over the past 28 years, the leader has been working hard to achieve the release of Peltier and is a member of the Leonard Peltier Defense Committee."
# Input target.
target = "Peltier"
# output response
flant5_response = target_sentiment_extraction(sentence, target)
print(f"Author opinion towards `{target}` in `{sentence}` is:\n{flant5_response}")

The response of the model is as follows:

Author opinion towards "Peltier" in "Over ..." is: positive

Downstream Use

Please refer to the related section of the Reasoning-for-Sentiment-Analysis Framework

With this example it applies this model in the THoR mode to the validation data of the RuSentNE-2023 competition for evaluation.

python thor_finetune.py -m "nicolay-r/flan-t5-tsa-thor-xl" -r "thor" -d "rusentne2023" -z -bs 4 -f "./config/config.yaml"

Following the Google Colab Notebook for implementation reproduction.

Out-of-Scope Use

This model represent a fine-tuned version of the Flan-T5 on RuSentNE-2023 dataset. Since dataset represent three-scale output answers (positive, negative, neutral), the behavior in general might be biased to this particular task.

Recommendations

Users (both direct and downstream) should be made aware of the risks, biases and limitations of the model. More information needed for further recommendations.

How to Get Started with the Model

Please proceed with the code from the related Three-Hop-Reasoning CoT section.

Or following the related section on Google Colab notebook

Training Details

Training Data

We utilize train data which was automatically translated into English using GoogleTransAPI. The initial source of the texts written in Russian, is from the following repository: https://github.com/dialogue-evaluation/RuSentNE-evaluation

The translated version on the dataset in English could be automatically downloaded via the following script: https://github.com/nicolay-r/Reasoning-for-Sentiment-Analysis-Framework/blob/main/rusentne23_download.py

Training Procedure

This model has been trained using the Three-hop-Reasoning framework, proposed in the paper: https://arxiv.org/abs/2305.11255

For training procedure accomplishing, the reforged version of this framework was used: https://github.com/nicolay-r/Reasoning-for-Sentiment-Analysis-Framework

Google-colab notebook for reproduction: https://colab.research.google.com/github/nicolay-r/Reasoning-for-Sentiment-Analysis-Framework/blob/main/Reasoning_for_Sentiment_Analysis_Framework.ipynb

Setup: Flan-T5-xl up to 64 tokens, 4-batch size.

GPU: NVidia-A100, bfloat16, ~ 30 min/epoch

The overall training process took 3 epochs.

Training Hyperparameters

Training regime: All the configuration details were highlighted in the related config file

Evaluation

Testing Data, Factors & Metrics

Testing Data

The direct link to the test evaluation data: https://github.com/dialogue-evaluation/RuSentNE-evaluation/blob/main/final_data.csv

Metrics

For the model evaluation, two metrics were used:

F1_PN -- F1-measure over positive and negative classes;
F1_PN0 -- F1-measure over positive, negative, and neutral classes;

Results

The test evaluation for this model showcases the F1_PN = 60.024

Below is the log of the training process that showcases the final peformance on the RuSentNE-2023 test set after 4 epochs (lines 5-6):

tsv

  F1_PN  F1_PN0  default   mode
66.678  73.838   73.838  valid
68.019  74.816   74.816  valid
67.870  74.688   74.688  valid
65.090  72.449   72.449   test
65.090  72.449   72.449   test