Teacher: In this task you are given a sentence. You must judge whether the main verb of the sentence is in present or past tense. Label the instances as "Present" or "Past" based on your judgment. If there is no verb in the given text, answer "Present".
Teacher: Now, understand the problem? If you are still confused, see the following example:
She shone her light around the space, following the glow of the flashlight's ray along the walls.
Solution: Past
Reason: The verb "shone" is in past tense.

Now, solve this instance: Seldon extracted several sheets.
Student:
Past