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1 / Covid ( {@UC San Francisco@} ) Chronicles , Day 383 Perhaps the most confusing time since the start of the pandemic – its easy to be overwhelmed . I ’ll try to make sense of some of the key trends , particularly the “ 4th surge ” & vaccines vs variants . Bottom line : I ’m still leaning optimistic .
 Covid, UC San Francisco, Chronicles
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: group, creative work, person, event, product, location, corporation 
Text: {0} 
Answer:
 Covid, UC San Francisco, Chronicles