A singing group performing outdoors.
A singing group performing indoors.
The group cannot be performing indoors and outdoors at the same time
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_outdoors(x3) & (x1 = x2) & n_group(x1) & a_singing(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_indoor(x3) & (x1 = x2) & n_group(x1) & a_singing(s1) & Theme(s1,x1))