These people are doing dangerous things.
People doing hazardous things.
Hazardous and dangerous are the same thing.
exists e1 s1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_thing(x2) & a_dangerous(s1) & Theme(s1,x2))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_thing(x3) & a_hazardous(s1) & Theme(s1,x3) & (x1 = x2) & n_people(x1))