Given a concept word, generate a hypernym for it. A hypernym is a superordinate, i.e., a word with a broad meaning constituting a category, that generalizes another word. For example, color is a hypernym of red. 
One example: knife
Solution is here: weapon
Explanation: A knife is a type of weapon, therefore weapon is a valid hypernym for knife.

Now, solve this: lemon
Solution:
fruit