the lack of "lable"

[rhyhck]

Hello author, when I read the code, I found that the definition of "lable" is missing here, could you please share the relevant code?
Its position is as follow:

COV-CTR/ASKG/pretrain/cn_image_sentence_train.py

Line 87 in bd515ae

labeled_img, num = label(heatmap, connectivity=2, background=0, return_num=True)