Teacher: In this task, you're given a context, a sentence,  and a character. The sentence describes an action or job of the given character. Also, the context provides more information about the sentence or the character. Your task is to return one of the emotions which are expressed by the Character in the given sentence. For that you can use the Context; however, Context is not provided in all the inputs. Also, in some inputs, there can be zero emotion; for that return 'None'.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Context: A cook was carrying an armful of oranged in the kitchen. 
 Sentence: He dropped one on the floor by accident. 
 Character: Cook
Solution: annoyed
Reason: The cook dropped one orange on the floor, so, he must feel annoyed at that time.

Now, solve this instance: Context: Robert decided to make a sandwich. He got the bread and bologna and cheese. He started to make the sandwich but forgot the mayo, so he got that. He put the bologna and cheese and mayo between two pieces of bread. 
 Sentence: Robert ate his sandwich. 
 Character: Robert
Student:
happy