Given the sentence "People dressed in red are walking into an ivory colored building that looks like a castle." is it true that "People are exploring an ancient castle as part of a scavenger hunt."?
Let’s work this out in a step by step way to be sure we have the right answer.
it is not possible to tell
People walking into a castle-like building are not necessarily part of a scavenger hunt.

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So, the answer is it is not possible to tell