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: earth 
 Entity 2: iron - nickel
yes

Entity 1: violet 
 Entity 2: leaf petiole
yes

Entity 1: rectum 
 Entity 2: stem

no