    def build_data_multi_txt_gt(self):
        """each image may have multiple ground_truth text，e.g., COCO and Flickr30K"""
        txt_id = 0
        for img_id, ann in enumerate(self.raw_anno_list):
            self.image.append(ann["image"])
            self.img2txt[img_id] = []
            _captions = ann["caption"] \
                if isinstance(ann["caption"], list) else [ann["caption"], ]
            for i, caption in enumerate(_captions):
                self.text.append(pre_text(caption))
                self.img2txt[img_id].append(txt_id)
                self.txt2img[txt_id] = img_id
                txt_id += 1
each image may have multiple ground_truth text，e.g., COCO and Flickr30K
videomamba/video_mm/dataset/caption_dataset.py