A drummer is sitting behind a drum kit near to someone playing a guitar.
The band is practicing.
Sentence 1 is missing band is practicing
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(behind(e1,x2) & to(s2,x4) & Theme(e2,x6) & Actor(e2,x5) & v_play(e2) & n_guitar(x6) & (x4 = x5) & n_person(x4) & Theme(s2,x3) & a_near(s2) & (x2 = x3) & n_kit(x2) & a_drum(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_drummer(x1))
exists e1 x1.(n_band(x1) & Actor(e1,x1) & v_practice(e1))