<span>Which aspect of The Tempest would be most affected if the story took place in a city in Europe rather than an isolated island?<span>shakespear commentary on colonialism</span></span>
Well, what is the metaphore, and what are the options? I can't answer unless those are provided.
Every gerund has the same form - verb + -ing. So, having that in mind, the word <em>sleeping </em>is used as a gerund in this sentence, but it is also a subject of the sentence.
They needed more personality