system
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human
Add a linking word to connect these two sentences: "The water was cold, so we couldn't swim. We sunbathed instead."

Relevant data:
It was hot outside, so we decided to go to the beach. After we got there, we realized that the water was unexpectedly icy. The water was cold, so we couldn't swim, but we lay in the sun to sunbathe instead.
gpt
The water was too cold to swim, so we sunbathed instead.