Four people playing instruments underneath a white tent.
The four people are in a band.
People playing instruments does not imply being in a band.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & underneath(e1,x4) & n_tent(x4) & a_white(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_instrument(x3) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists p1 x1.(n_people(x1) & card_eq_4(x1) & exists x2.(in(x1,x2) & n_band(x2)))