TASK DEFINITION: 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).
PROBLEM: Entity 1: surface 
 Entity 2: vertex

SOLUTION: yes

PROBLEM: Entity 1: fish 
 Entity 2: enzyme

SOLUTION: yes

PROBLEM: Entity 1: sign system 
 Entity 2: fossil shell

SOLUTION:
no