added link to training sets
added link to training sets
NCBI-Hackathons/Cancer_Epitopes_CSHL,NCBI-Hackathons/Cancer_Epitopes_CSHL,NCBI-Hackathons/Cancer_Epitopes_CSHL,NCBI-Hackathons/Cancer_Epitopes_CSHL,NCBI-Hackathons/Cancer_Epitopes_CSHL