@inproceedings{tian-dogan-2026-seahawk,
    title = "Seahawk at {M}ed{G}en{V}id{QA} 2026: {LLM} Segment-Range Selection for Medical Visual Answer Localization",
    author = "Tian, Xiaotian  and
      Dogan, Gulustan",
    editor = "Gupta, Deepak  and
      Demner-Fushman, Dina",
    booktitle = "Proceedings of the {B}io{NLP} 2026 (Shared Tasks)",
    month = jul,
    year = "2026",
    address = "San Diego, California, USA",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-acl-workshops/2026.bionlp-2.34/",
    pages = "257--261",
    ISBN = "979-8-89176-435-4",
    abstract = "Medical visual answer localization requires identifying the temporal span in a video where a medical question is answered or visually explained. We present a simple retrieval-and-selection pipeline for Task C that treats visual answer localization as segment-level answer paragraph selection over timestamped video transcripts. Given a question and a segmented transcript, our system prompts DeepSeek to select a contiguous range of transcript segments rather than directly generating timestamps. The final start and end times are then computed deterministically from the selected segment boundaries, decreasing the risk of hallucinated or malformed temporal outputs. To support long videos, we apply overlapping sliding-window prompting and rank candidate ranges using lexical question. In a 20-sample sanity check on test dataset, a completeness-biased configuration achieved an mIoU of 0.3217, while a shorter duration-penalized configuration improved performance to 0.4815. These results suggest that constrained LLM-based segment selection, combined with deterministic timestamp extraction, is a practical baseline for medical visual answer localization."
}