1.   Rows of long tables, aligned like a college lecture center, fill up the room.

2.   The man, armed with a rifle, was holed up in a basement lecture center.

3.   The man had holed up in a basement lecture center at the State University of New York at Albany.

4.   The man, armed with a rifle, had holed up in a basement lecture center.

5.   The man, armed with a rifle, was holed up in a basement lecture center, which was cordoned off by police.