A group of men in white lab coats watching something burn.
Women are working in a lab.
Men and women are different genders. Lab cannot refer to both a kind of clothing and a place. Watching and working are two different adverbs.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & Theme(e1,x6) & Actor(e1,x5) & v_watch(e1) & Time(x6,x7) & n_burn(x7) & n_thing(x6) & (x1 = x5) & of(x1,x2) & in(x2,x3) & n_coat(x3) & of(x3,x4) & n_lab(x4) & a_white(s1) & Theme(s1,x3) & n_man(x2) & n_group(x1))
exists e1 x1 x2.(in(e1,x2) & n_lab(x2) & Actor(e1,x1) & v_work(e1) & n_woman(x1))