Given two entities as input, classify as "yes" if second entity is the part of the first entity. Otherwise classify them as "no". These are entities of meronym In linguistics, meronymy is a semantic relation between a meronym denoting a part and a holonym denoting a whole. In simpler terms, a meronym (i.e., second entity) is in a part-of relationship with its holonym (i.e., first entity).

Entity 1: panther chameleon 
 Entity 2: tongue
yes

Entity 1: nuclear fission 
 Entity 2: atom
yes

Entity 1: people 
 Entity 2: bloodstream

yes