TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: Someone tenderly watches her mother with the tear.

SOLUTION: A chair is dragged across a stone floor.

PROBLEM: Subdued students in regimented ranks, stride across the courtyard.

SOLUTION: Someone, in black tunic and gown, stands in an upper archway.

PROBLEM: As he is sitting prominently around someone's desk, the salesman starts several paces.

SOLUTION:
During this someone has moved out from behind the columns, creeping cautiously across the open space between the two colonnades and finally, behind the second.