as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
rewrite this sentence: 
"john ran and ran until he couldn't run anymore."
user
john sprinted ceaselessly until he was completely exhausted, unable to take another step forward.
assistant