A row of firefighters are shooting water out of a hose.
Firemen are in a training exercise
We have no idea if they are in a training exercise, they could be doing a number of things.
exists e1 x1 x2 x3 x4.(of(e1,x4) & n_hose(x4) & r_out(e1) & Theme(e1,x3) & Actor(e1,x1) & v_shoot(e1) & n_water(x3) & of(x1,x2) & n_firefighter(x2) & n_row(x1))
exists p1 x1.(exists x2 x3.(in(x1,x2) & n_exercise(x2) & of(x2,x3) & n_training(x3)) & n_fireman(x1))