Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.

When they are done they stop by a red railing, the worker goes back and begins to sweep the stones.
They go around quite a few times again and again in a circle around a small gated area.

To someone's surprise, he unfastens his artificial metal leg and places it on a stand.
He hobbles painfully towards a chair and sits down.

Now, someone walks briskly out of the foyer onto a square.

As people cruise by, they overhear a witness.