What is an example of foreshadowing in Our Town by Thornton Wilder?

William Delaney

is full of , perhaps more so than in almost any other play. Much
of this foreshadowing is provided by the narrator, who is called the Stage Manager. He seems to
know everything about everybody. He knows about everyone's past, present and future.

For example, the Stage Manager tells the audience: 

The First Act shows a day in our town. The day is May 7,
1901.

The Stage Manager mentions a great
number of the town's citizens, including Doc  Gibbs and Mrs. Gibbs who are alive and active as
of that date, and also a newspaper delivery boy named Joe Crowell, Jr. Yet, still early in the
First Act in 1901, he tells the audience:

Doc Gibbs died in 1930. The new hospital's named after
him.

Mrs. Gibbs died first--long time ago, in
fact.

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