You are given a sentence and a question in the input. The information provided in the sentence should be enough to answer the question. You're expected to write the correct answer. Do not use any facts other than those provided in the sentence.

Sentence: Ralph dressed up in a spooky costume and waited for Henry to swim over to the side of the lake.
Question: How did Ralph trick Henry into thinking the lake was scary?
dressed up in a spooky costume.