Marching band dressed in yellow and green march on the field.
The marching band is performing on the field.
If a marching band is marching on the field, that implies that they are performing on the field.
exists e1 e2 s1 s2 x1 x2 x3.(n_field(x3) & in(e2,x2) & on(x2,x3) & n_march(x2) & a_green(s2) & Theme(s2,x2) & a_yellow(s1) & Theme(s1,x2) & Theme(e2,x1) & v_dress(e2) & n_band(x1) & Actor(e1,x1) & v_march(e1))
exists e1 x1 x2 x3.(n_field(x3) & n_band(x1) & of(x1,x2) & n_marching(x2) & on(e1,x3) & Actor(e1,x1) & v_perform(e1))