Which Reminds Me

My great-grandparents and the Andersons went out to dinner together in maybe the 1940s where they possibly reminisced on having done missionary work together in China in the 1910s or 1920s, but I only know that from doing some research, not because anyone ever explained this to me in simple English language. Not to be confused with the Anderson syndicate's various partners in crime of whom nothing is known. Hmmm....  Is there something more that we should know about that? But we will just turn you over to the authorities so you probably won't want to actually tell us what is your problem.