A man with glasses working in a laboratory.
A scientist works long into the night on his experiment.
Not all men are a scientist.  Working in a lab does not imply he worked long into the night on his experiment.
exists e1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & in(e1,x4) & n_laboratory(x4) & Actor(e1,x3) & v_work(e1) & (x2 = x3) & n_glass(x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_experiment(x3) & of(x3,x2) & n_male(x2) & n_night(x2) & on(e1,x3) & a_long(s1) & Manner(e1,s1) & into(e1,x2) & Actor(e1,x1) & v_work(e1) & n_scientist(x1))