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".

Q: " He was a bum, " Ella chimed in.

A: Past
****
Q: He sniffed, but didn't smell a wolf.

A: Past
****
Q: After the caboose lost it's wheels, it tipped to one side and slowly began to roll over as we crossed the bridge.

A:
Past
****