Given the task definition and input, reply with output. In this task, you are given a sentence and question which can be answered using the sentence. Your task is to answer the question using the information from the sentence. The answer to the question is unique and it is a continuous text span from the sentence.

Sentence: However , when compared to BLAST , it is more time consuming , not to mention that it requires large amounts of computer usage and space . 
 Question: what   requires something?

it