<!DOCTYPE html> <html> <head> <style> div p:only-child{ background-color:lightblue; } </style> </head> <body> <div> <p>This is one paragraph of first division element.</p> </div> <div> <p>This is the first paragraph of the second element.</p> <p>This is the second paragraph of the second element.</p> </div> </body> </html>
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