Several people are on a shoreline that has a sign behind them.
The people are watching basketball at an inside arena.
Inside an arena would be different from on a shoreline because a shoreline is by a body of water, which is outside.
exists p1 s1 x1.(exists e1 x2 x3 x4.(on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_have(e1) & behind(x4,x1) & n_sign(x4) & (x2 = x3) & n_shoreline(x2)) & n_thing(x1) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_people(x1) & at(e1,x3) & n_arena(x3) & a_inside(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_basketball(x2))