Conversation so far:
when was George Mallory in europe?
In 1910.
what did George Mallory do in europe?
Mallory was in a party led by Irving, Mallory and a friend attempted to climb Mont Vélan in the Alps.
were Irving and Mallory successful in their attempt to climb the Alps?
The team turned back shortly before the summit due to Mallory's altitude sickness.

Question: did they try again?
Self-contained rewrite: did Irving and Mallory try to climb Alps again?