CONCEPTS: ceremony, firework, part

GEN: fireworks explode over hotel as part of the development during its opening ceremony .

CONCEPTS: acknowledge, conductor, performance

GEN: conductor acknowledges opera singer following a performance .

CONCEPTS: aircraft, flight, model

GEN: side profile of aircraft model with another aircraft in flight

CONCEPTS: infant, lie, time

GEN:
Two infants lay on a play mat fussing at the same time.