You will be given a definition of a task first, then some input of the task.
In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Question: By what experimental procedure can we evaluate the implicit memory ?:
Options: <1> The repetition priming. <2> The partial report technique. <3> The technique of the total report. <4> The method of savings. <5> The free memory.
Output:
1