Group of people lighting paper on fire in a chemistry lab.
A group of students light paper on fire as their chemistry teacher looks on.
Just because their is people in a chemistry lab doesn't mean the teacher is there.
exists e1 s1 x1 x2 x3 x4 x5 x6.(ne_org_group(s1) & a_topic(s1) & of(s1,x1) & in(e1,x5) & n_lab(x5) & of(x5,x6) & n_chemistry(x6) & on(e1,x4) & n_fire(x4) & Theme(e1,x3) & Actor(e1,x2) & v_light(e1) & n_paper(x3) & (x1 = x2) & n_people(x1))
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & of(x1,x2) & on(e1,x7) & (x2 = x7) & Actor(e1,x3) & v_look(e1) & as(x3,x5) & n_teacher(x5) & of(x5,x6) & n_chemistry(x6) & of(x5,x1) & n_thing(x1) & on(x3,x4) & n_fire(x4) & n_paper(x3) & a_light(s1) & Theme(s1,x3) & n_student(x2) & n_group(x1))