premise: A choir, in spotlight, standing in a semi-circle, being lead by a conductor, who is in shadow in front of the choir, and wearing a gray and black striped shirt and black pants. hypothesis: An a capella group is getting ready to perform in front of a massive audience.
neutral: Not all choirs are acapella.  Some use instruments while they sing.  The choir may not be getting ready to perform, they could be leaving the stage at the end of a performance.  The choir may not be singing for a massive audience, they could be practicing in an empty room.