There is some musicians and a man in white playing on a stage.
A group of students sit silently in the library.
The group can not be silent in the library and be playing on a stage at the same time.
exists p1 x1 s1 x2 x3 x4 x5 x6.((x1 = x2) & subset_of(x4,x2) & in(x4,x5) & on(x5,x6) & n_stage(x6) & n_playing(x5) & a_white(s1) & Theme(s1,x5) & n_man(x4) & subset_of(x3,x2) & n_musician(x3))
exists e1 s1 x1 x2 x3.(n_library(x3) & in(e1,x3) & a_silently(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_student(x2) & n_group(x1))