A man works very hard tattooing another person.
The person is teaching inside the math classroom.
A person cannot be applying tattoo at the same time the man is teaching.
exists e2 e1 s1 x1 x2 x3.(n_person(x2) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_tattoo(e2) & n_person(x3) & -(x3 = x2) & r_very(e1) & a_hard(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_classroom(x2) & of(x2,x3) & n_math(x3) & n_person(x1) & inside(e1,x2) & Actor(e1,x1) & v_teach(e1))