In part II of homework #3, just to clarify, the sentence you are trying to construct does contain more than just the words called and for. There are five lexical items (five words). Three of those words are pronouns (which means I perhaps should have included something like a [PRN] feature on them as well). But the sentence contains three pronouns, the verb called and the preposition for.

I didn’t give you the pronunciation of the pronouns, but the features that I gave for them will determine the pronunciation of each unambiguously.