Read the following premise and pick the correct choice. Then, respond with which of the choices is correct.
Premise: The patient underwent the risky medical procedure.

Choice 1: The procedure was costly.
Choice 2: Specialists recommended the procedure.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1 or 2 (The premise does not provide enough information to determine if the procedure was costly or if specialists recommended it.)