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: human body 
 Entity 2: melanin
yes

Entity 1: propeller 
 Entity 2: base pair
no

Entity 1: or conidiophore 
 Entity 2: skin

no