You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Genghis_Khan

Context:
In another incident, around 1177, he was captured in a raid and held prisoner by his father's former allies, the Tayichi'ud. The Tayichi'ud enslaved Temüjin (reportedly with a cangue, a sort of portable stocks), but with the help of a sympathetic guard, the father of Chilaun (who later became a general of Genghis Khan), he was able to escape from the ger (yurt) in the middle of the night by hiding in a river crevice.[citation needed] It was around this time that Jelme and Bo'orchu, two of Genghis Khan's future generals, joined forces with him. Temüjin's reputation also became widespread after his escape from the Tayichi'ud.

Question:
How was Temüjin kept imprisoned by the Tayichi'ud?

with a cangue, a sort of portable stocks