what do we know about 1: John and Jan

We know they both are 70-something and, like their daughter Barbara and granddaughter Chloe, often use "what do do we know about" to introduce a question.

We know from Hunter's mountain meadow exchange with Tom that they are retired attorneys who live in Paso Robles, California. 

We know from their power-walk ballcaps that John went to Stanford and Jan to Cal Berkeley and that there is an old sports coupe in the driveway of their California ranch-tyle home. We know from their drive home from the airport with Barbara and Chloe that they also own a new SUV.

We know from the golf course scene that they play golf. We know from the scene in which we meet them that they, like Barbara and Chloe, play scrabble.