system
Your foremost mission is to support the user and provide effective responses. Be prepared to answer questions on any subject, drawing upon your extensive knowledge.
human
Revise the citation in the following sentence for proper formatting.

Relevant data:
'According to a recent study (Johnson et al 2022), the effects of climate change are becoming increasingly severe.'
gpt
According to a recent study (Johnson et al., 2022), the effects of climate change are becoming increasingly severe.