TASK DEFINITION: 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".
PROBLEM: We obtained this land from them. "

SOLUTION: Past

PROBLEM: He sniffed, but didn't smell a wolf.

SOLUTION: Past

PROBLEM: A sheer wall blocks all further progress.

SOLUTION:
Present