Scientists hard as work in a lab.
A group of scientists are performing vital experiments in their place of work
Just because scientists are in a lab it does not mean they are performing vital experiments.
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 s1 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_perform(e1) & in(x3,x4) & of(x4,x5) & n_work(x5) & n_place(x4) & of(x4,x1) & n_thing(x1) & n_experiment(x3) & a_vital(s1) & Theme(s1,x3) & of(x1,x2) & n_scientist(x2) & n_group(x1))