Can we draw the following hypothesis from the context (see options)?

Context:

An opening act, warm-up act, or supporting act is an entertainment act (musical, comedic, or otherwise), that performs at a concert before the featured act, or "headliner". Rarely, an opening act may perform again at the end of the event, or perform with the featured act after both have had a set to themselves.

Hypothesis: A opening act always performs before a headliner's set.
pick from the following. 1). Yes 2). It's impossible to say 3). No
1).