Complex sentence: There can be a variety of ways to identifying drugs using network pharmacology, such as the "guilt by association" method; if two diseases are treated by the same drug, a drug that treats one disease may treat the other.
Split into simpler sentences: There can be a variety of ways to identifying drugs using network pharmacology; a simple example of this is the "guilt by association" method. This states if two diseases are treated by the same drug, a drug that treats one disease may treat the other.