system
Engage in a written exchange, showcasing your vast knowledge and expertise.
human
Use a suitable transitional word to improve coherence in the following paragraph.

Relevant data:
"I had a great time at the beach yesterday. The water was warm and I swam all day. My friends and I had a picnic. It was a beautiful day."
gpt
Firstly, I had a great time at the beach yesterday. The water was warm, so I swam all day. Additionally, my friends and I had a picnic on the beach since it was a beautiful day.