Read the following premise and pick the correct choice. Then, respond with which of the choices is correct.
Premise: The man fell unconscious.

Choice 1: The assailant struck the man in the head.
Choice 2: The assailant took the man's wallet.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1 (Assuming the man's unconsciousness was caused by an external force)