Detailed Instructions: In this task your given a passage in Catalan. you must ask a question in Catalan, that is relevant to the passage. A question that is constructed should be precise and based on factual information from the passage. A constructed question should be: (a) unambiguous (b) be directly answerable from the passage (c) have a unique answer (d) have an answer that is a continuous span of text from the passage. Try to avoid formulating questions that (a) can be answered without referring to the passage, or (b) use exactly the same words or questions given in the passage. Try to make the question fluent in the language used. You have to create exactly one question.
Problem:El 1926 viatjà a Oklahoma, on havia estat concentrada forçosament una quarta part de la població ameríndia dels Estats Units. Curtis hi va poder comprovar l'accelerat procés d'aculturació que havien patit.[4] L'any següent, va organitzar una darrera expedició en un petit vaixell que el va dur, acompanyat per Beth, a Alaska i fins a l'Estret de Bering, per estudiar els esquimals. El resultat no podia presentar més contrast: hi trobà els únics nadius que encara vivien amb plenitud la seva cultura tradicional.[4]
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Quin any va viatjar a Oklahoma Curtis?