People are working on the factory floor while yellow stacks of paper go by.
Coworkers are chatting while working in a factory
Just because people are working in a factory does not mean their coworkers are chatting.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_floor(x2) & of(x2,x3) & n_factory(x3) & a_by(s2) & Manner(e1,s2) & while(e1,x4) & of(x4,x5) & n_go(x5) & of(x5,x6) & n_paper(x6) & n_stack(x4) & a_yellow(s1) & Theme(s1,x4) & on(e1,x2) & Actor(e1,x1) & v_work(e1) & n_people(x1))
exists e2 e1 x1 x2.(while(e1,e2) & in(e2,x2) & n_factory(x2) & Actor(e2,x1) & v_work(e2) & Actor(e1,x1) & v_chat(e1) & n_coworker(x1))