(A) The predicted drug-cancer indication network based on the experimentally validated drug-target interaction (ExpNet) only, containing 635 significant drug-cancer indications pairs (SDCs) between 124 natural products and 13 cancer types. (B) The predicted drug-cancer indication network based on both experimentally validated and computationally predicted drug-target interactions (Exp&ComNet), containing 993 SDCs between 196 natural products and 13 cancer types. The 13 major cancer types are: leukemia, bladder, breast, colon, glioblastoma multiforme (GBM), kidney, lung, ovarian, prostate, melanoma, stomach, thyroid, and uterine cancers.