I have a couple of questions on identifying nouns in a sentence. <br/><br/>The first sentence:<br/><br/>Because of their intelligence and athletic ability, Karen Cornell and Leonard Johnson were named "Scholar Athletes."<br/><br/>The Second Sentence:<br/><br/>Congress debated the merits of the tax bill late into the night.<br/><br/>My questions are: is athletic ability a noun? if so, which type. is merits a noun? if so, which type. <br/><br/>Thanks.