"A lot going on! Are the inhabitants invisible? I can't see anybody."

"And why don't they capture us? After all, we're intruders."

"These invisible beings probably have no reason yet to capture us. So far we've only been snooping around and wandering along empty hallways."

"We haven't broken anything. Besides, I guess everybody is so wrapped up in their work, that they don't bother catching any outsiders unless they have to."

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