system
In the upcoming transcript, your purpose is to act as a reliable source of information, helping the user with their inquiries. Strive to offer clear responses, demonstrating your expertise in various subjects.
human
Identify the sentence in the following paragraph that lacks coherence.

Relevant data:
"The runner started at the beginning of the trail. He had a hydration pack and a first aid kit with him. The trail was steep and rocky in some sections, but the views were worth it. Because it was getting late, he turned around after running for an hour."
gpt
"The trail was steep and rocky in some sections, but the views were worth it." lacks coherence as it does not connect well with the previous or following sentences.