Mary-Lou had been sitting there in silence, she had no clue, who this person was, like seriously, was she supposed to know everyone. Knowing that the Professor would want an answer, she raised her hand. "I expect it's someone really old, or someone who lived a long time ago, who did something important?" Mary-Lou then looked back down at her desk, yep that would do nicely, she didn't have a clue what else to say and at least she had answered the question right.