Scientists hard as work in a lab.
Scientists are relaxing at lunch
Scientists cannot be relaxing if they are working hard.
exists s1 x1 x2 x3 x4.(a_topic(x1) & as(s1,x3) & in(x3,x4) & n_lab(x4) & n_work(x3) & Theme(s1,x2) & a_hard(s1) & (x1 = x2) & n_scientist(x1))
exists e1 x1 x2.(at(e1,x2) & n_lunch(x2) & Actor(e1,x1) & v_relax(e1) & n_scientist(x1))