"Has been waiting" should be your answer. a simple predicate is the verb or verb phrase in the sentence and it usually tells what the subject does.
You didn't add the following?
If you are asking how to properly write the title then you should Put quotation marks around the poem's title unless it is a novel-length epic poem, such as "Paradise Lost" or "The Divine Comedy." In that case, italicize or underline the title. Cite the poem with a parenthetical citation if you are using MLA or APA format.