Java: Breaking Compound Sentences

Sometimes people write compound sentences which have two statements in one sentence.
For example I like you and you like me. I would like you to write a function called
BREAK_COMP that will accept a sentence and if the the sentence is a compound sentence
return a list containing a list for each statement. If the sentence is not a compound sentence
return a list of the sentence within a list.

You can assume the following:
1. AND is the only word that can create compound sentences.
2. Any time that AND is used it is a compound sentence.
3. A compound sentence can only have 1 AND in it.

If I type in (BREAK_COMP '(I like you))it will output ((I LIKE YOU))

You cannot use any String class functions like myString.substring(x, y).

Any help would be appreciated.