An orchestra of about 30 people are practicing on the stage of what appears to be an auditorium full of green chairs.
An orchestra of about 30 people are happily practicing.
Musicians practicing do not necessarily have to do so happily.
exists e1 x1 x2 x3.(n_stage(x3) & exists e2 p1 x4.(n_thing(x4) & on(e1,x3) & of(x3,x4) & Topic(e2,p1) & Actor(e2,x4) & v_appear(e2) & exists p2 s1 s2 x5 x6 x7.((x4 = x5) & of(s1,x7) & n_chair(x7) & a_green(s2) & Theme(s2,x7) & Theme(s1,x6) & a_full(s1) & (x5 = x6) & n_auditorium(x5))) & Actor(e1,x1) & v_practice(e1) & of(x1,x2) & n_people(x2) & n_date(x2) & a_date_day_30(x2) & a_date_day_30(x2) & r_about(x2) & n_orchestra(x1))
exists e1 s1 x1 x2.(a_happily(s1) & Manner(e1,s1) & Actor(e1,x1) & v_practice(e1) & of(x1,x2) & n_people(x2) & n_date(x2) & a_date_day_30(x2) & a_date_day_30(x2) & r_about(x2) & n_orchestra(x1))