Middle-aged man with brown hair focuses on measuring substance in beaker in a lab.
A chemistry teacher measures carefully to show the class how to do it.
Even though the setting might indicate it, there is no proof that the man is indeed a teacher.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(on(e1,e2) & in(e2,x6) & n_lab(x6) & in(e2,x5) & n_beaker(x5) & Theme(e2,x4) & Actor(e2,x3) & v_measure(e2) & n_substance(x4) & Actor(e1,x1) & v_focus(e1) & with(x1,x2) & n_hair(x2) & a_brown(s2) & Theme(s2,x2) & n_man(x1) & a_middle-aged(s1) & Theme(s1,x1))
exists p1 s1 x1 x2 x3 x4.(n_class(x4) & a_topic(x1) & Topic(x1,p1) & a_carefully(s1) & Manner(p1,s1) & exists e1 p2.(Theme(e1,x4) & Actor(e1,x1) & v_show(e1) & Topic(x4,p2) & exists e2.(Theme(e2,x1) & Actor(e2,x4) & v_do(e2))) & n_thing(x1) & n_measure(x1) & of(x1,x3) & n_teacher(x3) & of(x1,x2) & n_chemistry(x2))