Instructions: In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Input: What rules were familiar to Buddha's hearers?, Context: The three marks of existence may reflect Upanishadic or other influences. K.R. Norman supposes that the these terms were already in use at the Buddha's time, and were familiair to his hearers.
Output:
Upanishadic