Q: 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.
A partir dels anys 1960, Xammar i Pla van reprendre el contacte i refan la seva amistat. L'obra feta per Pla en tots aquests anys era molt positiva per la defensa de la llengua i la cultura catalana i Xammar ho va reconèixer. Van sovintejar les visites a Llofriu i a Granollers, fent parada a l'Hostal de la Gavina i la Fonda Europa, respectivament.[55]
A:
Quin any van refer la seva amistat Xammar i Pla?