Given the task definition, example input & output, solve the new input case.
The goal of this task is to translate questions in English into Catalan. The requirements of the translation is that: the text must be equivalent in meaning, the text must not be ambiguous, and the text must be written as a question
Example: How many points did the Panthers defense surrender?
Output: Quants punts va cedir la defensa dels Panthers?
This is a good translation, because the translation conveys the same meaning and is not ambiguous.

New input case for you: When was the European Convention on Human Rights established?
Output:

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
Quan es va establir el Conveni Europeu de Drets Humans?