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: organic compound 
 Entity 2: carbon skeleton

SOLUTION: yes

PROBLEM: Entity 1: brain 
 Entity 2: enzyme

SOLUTION: no

PROBLEM: Entity 1: needle 
 Entity 2: surface area

SOLUTION:
yes