A construction worker in a neon vest is working with electrical equipment while sparks fly.
A worker is not sure what he is doing.
A construction worker in a neon vest is working with electrical equipment while sparks fly does not necessary that he is not sure what he is doing.
exists e1 p1 s1 x1 x2 x3 x4 x5.(exists e2 x6.(Actor(e2,x6) & v_fly(e2) & n_sparks(x6)) & while(e1,p1) & with(e1,x5) & n_equipment(x5) & a_electrical(s1) & Theme(s1,x5) & Actor(e1,x1) & v_work(e1) & in(x1,x3) & n_vest(x3) & of(x3,x4) & n_neon(x4) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists x1.(-exists e1 s1 x2.(n_thing(x2) & Theme(s1,x2) & Actor(s1,x1) & a_sure(s1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1)) & n_male(x1) & n_worker(x1))