Q: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Ben Tennyson: Whoa , what IS this place ?
Grandpa Max: A blast from the past . It 's an old Plumbers base .
Ben Tennyson: Like the _ one _ at Mount Rushmore ?
Grandpa Max: Not exactly . At the height of the Plumbers , some of these satellite complexes were established around the country in hidden locations , like this one . Once we brought down Vilgax the first time , these annexes were n't needed anymore , so we eventually shut 'em all down .
A:
place