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The clifftop walks to the bays of Lavernock , St Mary 's Well and Swanbridge with their beaches and the historic hut where Marconi first transmitted radio messages over open sea remain popular with residents and visitors alike .
 Lavernock, St Mary 's Well, Swanbridge, Marconi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lavernock, St Mary 's Well, Swanbridge, Marconi