Wedding Welcome Notes What Would Be A Good Question For A Wedding Time Capsule Survey?

What would be a good question for a wedding time capsule survey? - wedding welcome notes

I have a Time Capsule as a wedding gift from my sister who is married. I mean, the wedding favors and small pieces of paper and a survey of people in the marriage, close friends and family. Thus 20 years of marriage, what are the things that could predict? How many children, where they live, etc. .. Any other suggestions welcome