 Usage   ```python from transformers import DPRContextEncoder, DPRContextEncoderTokenizer  model = DPRQuestionEncoder.from_pretrained("vblagoje/dpr-question_encoder-single-lfqa-base").to(device) tokenizer = AutoTokenizer.from_pretrained("vblagoje/dpr-question_encoder-single-lfqa-base")  input_ids = tokenizer("Why do airplanes leave contrails in the sky?", return_tensors="pt")["input_ids"] embeddings = model(input_ids).pooler_output ```  