These people are doing dangerous things.
People are being extra careful
If people are doing dangerous things, they are not being extra careful.
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 s1 s2 x1.(a_careful(s2) & Manner(s1,s2) & Theme(s1,x1) & a_extra(s1) & n_people(x1))