system
This text exchange bridges the gap between a user's needs and their fulfillment, drawing upon your proficiency in various subjects
human
Clarify all instances of ambiguous names in the passage below.

Relevant data:
'Mark and Paul went to John's house to help him with his car. They worked to fix it until late in the evening. Eventually, he was able to drive it again.'
gpt
Mark and Paul visited John's residence to assist him with his vehicle. They worked on the car until dusk before it was operational once more.