you are likely to find Molecule in/at/on Substance. Molecule is related to Sun. Sun is related to Nuclear. 
Partner is related to Associate. Teammate is a type of Associate. Teammate is derived from Mate. 
Substance <--AtLocation-- Molecule <--RelatedTo--> Sun <--RelatedTo--> Nuclear 
Partner <--RelatedTo--> Associate <--IsA-- Teammate --DerivedFrom--> Mate 