A surgeon calibrates his machinery.
The surgeon takes care of his machinery.
Taking care of precise measurement machinery requires calibration.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_calibrate(e1) & n_machinery(x2) & of(x2,x1) & n_male(x1) & n_surgeon(x1))
exists e1 x1 x2 x3.(n_machinery(x3) & of(x3,x1) & n_male(x1) & n_surgeon(x1) & of(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_care(x2))