A reference group refers to a group to which an individual or another group is compared.
be specific to your question
anita was driven to the theatre by carla.
nowadays, black kites are protected by law.
the olives are stoned and crushed in this room by my son.
the shoplifter was tackled by my cousin.
the vase was smashed by heidi.
local yobs have defaced the wall already.
alison broke the piano.
jeremy released the article without permission.
the actors had performed the play by shakespeare.
the janitor mops the floor
lindy is killing the cat
mike and jay is playing the song departure today.
i'm sending this message to bisky.
gon and killua is jumping on the bed
hisoka is always throwing cards at his opponent