Conversation so far:
When did the Kon-Tiki expedition take place?
The Kon-Tiki expedition took place from late April to August of 1967.
Did Thor Heyerdahl go on the Kon-Tiki expedition alone?
Heyerdahl and five fellow adventurers sailed from Peru to the Tuamotu Islands, French Polynesia.
How long did it take for the Kon-tiki expedition raft to reach French Polynesia?
The Kon-Tiki expedition lasted 101-days.

Question: How long did they stay once they arrived there?
Self-contained rewrite: How long did the crew of the Kon-Tiki expedition stay once they arrived in French Polynesia?