A singer in a white button-down shirt is performing while a girl plays the guitar in the back.
The singer is wearing black pants.
The singer is said to be wearing a white button-down shirt but it is not stated what color pants the singer is wearing.
exists e1 p1 s1 s2 x1 x2 x4 x5.(n_back(x5) & n_guitar(x4) & exists e2 x3.(in(e2,x5) & Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_girl(x3)) & while(e1,p1) & Actor(e1,x1) & v_perform(e1) & in(x1,x2) & n_shirt(x2) & a_button-down(s2) & Theme(s2,x2) & a_white(s1) & Theme(s1,x2) & n_singer(x1))
exists e1 s1 x1 x2.(n_singer(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_pants(x2) & a_black(s1) & Theme(s1,x2))