1) First, from the picture we see that we have two equal angles: ∠A = ∠D = 47°.
2) Secondly, We also know that the line CF bisects AD.
3) Finally, the two opposite angles of B are equal, we call these angles ∠B.
From (1)-(2)-(3) we conclude that the answer is: angle-side-angle (ASA).
For example, we have the side/line AB between angles ∠A and ∠B.