These people are doing dangerous things.
There are people doing dangerous things.
Both subjects are doing dangerous things
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 p1 x1 e1 s1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_thing(x4) & a_dangerous(s1) & Theme(s1,x4) & (x2 = x3) & n_people(x2))