premise: Several firemen stand or sit on a gray roof while working.
hypothesis: Several fireman are putting out a fire on a gray roof.
explanation_1: Putting out a fire is not the only job firemen do.
explanation_2: There may not be any fire and they are not putting out fire.
explanation_3: Firemen can do other work besides putting out a fire.
premise_logic: (exists e1 s1 x1.(Actor(e1,x1) & v_stand(e1) & n_fireman(x1) & a_several(s1) & Theme(s1,x1)) | exists e3 e2 s2 s3 x2 x3.(while(e2,e3) & Actor(e3,x2) & v_work(e3) & on(e2,x3) & n_roof(x3) & a_gray(s3) & Theme(s3,x3) & Actor(e2,x2) & v_sit(e2) & n_fireman(x2) & a_several(s2) & Theme(s2,x2)))
hypothesis_logic: exists e1 s1 s2 s3 x1 x2 x3.(a_out(s3) & Manner(e1,s3) & on(e1,x3) & n_roof(x3) & a_gray(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_put(e1) & n_fire(x2) & n_fireman(x1) & a_several(s1) & Theme(s1,x1))