Problem: A somatic antigen is an antigen located in the cell wall of a gram-positive or gram-negative bacterium .
A somatic antigen is an antigen , which is in the cell wall of a gram-positive or gram-negative bacterium .
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A: yes

Problem: The municipality has a wet , cold and a dry season .
The municipality has a wet , a cold , and a dry season .
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A: yes

Problem: Together with Rosalind Franklin , James Watson and Francis Crick shared the Nobel Prize for Physiology and Medicine in 1962 , and Maurice Wilkins died from cancer in 1958 .
Together with James Watson and Francis Crick , Maurice Wilkins was awarded the Nobel Prize for Physiology and Medicine in 1962 , Rosalind Franklin had already died from cancer in 1958 .
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A:
no