People watching a man breakdance.
Nobody is watching him breakdance.
People watching a man doing breakdance cannot mean nobody is watching him doing a break dance.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_watch(e1) & n_breakdance(x3) & of(x3,x4) & n_man(x4) & (x1 = x2) & n_people(x1))
exists x2.(n_male(x2) & -exists e1 x1 x3.(Time(e1,x3) & n_breakdance(x3) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_person(x1)))