Part 1. 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).
Part 2. Example
Entity 1: plant 
 Entity 2: leaf
Answer: yes
Explanation: The answer is correct. Because the leaf is part of the plant. Therefore, here leaf is meronym and the plant is holonym.
Part 3. Exercise
Entity 1: thread 
 Entity 2: cytoplasm
Answer:
yes