Given the task definition, example input & output, solve the new input case.
Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.
Example: Sentence: 'Harry glanced again at the raw looking thing that trembled and choked in the shadow beneath the distant chair.', Argument/Subject 1: 'Harry', Argument/Subject 2: 'raw looking thing'
Output: glance
The sentence contains the generated relationship - glance, mentioned between two subjects - Harry and raw looking thing

New input case for you: Sentence: 'How many people understand that every year there are Christian festivals like Easter and the Muslim ones like Eid-Al-Fitr are set by the phases of the moon ?', Argument/Subject 1: 'easter', Argument/Subject 2: 'christian'
Output:
be festival of