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: membrane surface 
 Entity 2: back
no

Entity 1: butterfly wing 
 Entity 2: sodium
no

Entity 1: membrane 
 Entity 2: ionic compound

no