---
license: openrail
datasets:
- universal-dependencies/universal_dependencies
language:
- bg
- ca
- zh
- hr
- cs
- da
- nl
- en
- fi
- fr
- de
- hu
- id
- it
- ja
- ko
- 'no'
- pl
- pt
- ro
- ru
- sl
- es
- sv
- uk
- sr
base_model:
- meta-llama/Llama-2-13b-hf
library_name: peft
---

# Introduction
The paper explores the capabilities of Large Language Models (LLMs) like LLaMA in syntactic parsing tasks. We introduce U-DepPLLaMA, a novel architecture that treats Dependency Parsing as a sequence-to-sequence problem, achieving state-of-the-art results in 26 languages from the Universal Dependency Treebank. Our approach demonstrates that LLMs can handle dependency parsing without the need for specialized architectures, showing robust performance even with complex sentence structures. The paper is available [here](https://www.ai-lc.it/wp-content/uploads/2024/08/IJCOL_10_1_2_hromei_et_al.pdf).

For more details, please consult the associated [Github repository](https://github.com/crux82/u-deppllama).

This model comes in two sizes:
- [13 billion parameters](https://huggingface.co/sag-uniroma2/u-depp-llama-2-13b)
- [7 billion parameters](https://huggingface.co/sag-uniroma2/u-depp-llama-2-7b)

# How to use it

```Python
import transformers
import torch
from transformers import BitsAndBytesConfig, AutoModelForCausalLM, AutoTokenizer, GenerationConfig
from peft import PeftModel

quant_config = BitsAndBytesConfig(
    load_in_4bit=True,
    bnb_4bit_use_double_quant=True,
    bnb_4bit_quant_type="nf4",
    bnb_4bit_compute_dtype=torch.bfloat16
)

model = AutoModelForCausalLM.from_pretrained(
            "meta-llama/Llama-2-13b-hf",
            load_in_4bit=True,
            quantization_config=quant_config,
            torch_dtype=torch.float16,
            trust_remote_code=True,
            device_map={"": 0},
        )
model = PeftModel.from_pretrained(
            model,
            "sag-uniroma2/u-depp-llama-2-13b"
        )

generation_config = GenerationConfig(
        num_beams=4,
        do_sample=False,
        early_stopping=True,
    )

tokenizer = AutoTokenizer.from_pretrained("meta-llama/Llama-2-13b-hf", trust_remote_code=True)

input_string = "He was most widely recognized for some of his books."
prompt = f"""
### Input:
{input_string}
### Answer:"""

inputs = tokenizer(prompt, return_tensors="pt", padding=True, truncation=True, max_length=512)
input_ids = inputs["input_ids"].to(model.device)

with torch.no_grad():
    gen_outputs = model.generate(
        input_ids=input_ids,
        generation_config=generation_config,
        return_dict_in_generate=True,
        output_scores=True,
        max_new_tokens=1024,
        use_cache=True,
    )
s = gen_outputs.sequences[0]
output = tokenizer.decode(s, skip_special_tokens=True)

response = output.split("### Answer:")[1].rstrip().lstrip()
print(response)
```

# Citation
```
@article{hromei2024udeppllama,
  author  = "Hromei, Claudiu Daniel and Croce, Danilo and Basili, Roberto",
  title   = "U-DepPLLaMA: Universal Dependency Parsing via Auto-regressive Large Language Models",
  journal = "IJCoL",
  year    = 2024,
  volume  = "10",
  number  = "1",
  pages   = "21--38"
}
```