The contents in some files of txt folder preceds with a comma symbol. Some of the files names are mentioned below.
training dataset/001/txt/14_1_110.txt, line 1-7
training dataset/001/txt/15_17_51.txt, line 1-11
training dataset/001/txt/19_26_66.txt, line 1-10
training dataset/001/txt/21_1_68.txt, line 1-68
There are more files with same issue.