Suppose In-N-Out Burger is an American regional chain of fast food restaurants located primarily in California and the Southwest. The chain was founded in 1948 by Harry Snyder and his wife Esther. In-N-Out is known for its simple menu, quality ingredients, and 'secret menu' options such as Animal Style burgers and Neapolitan shakes.
Can we infer that "In-N-Out Burger was founded in the 1970s"? Yes, no, or maybe?