251596
The Vine – Matthews – Morley hypothesis , also known as the Morley – Vine – Matthews hypothesis was the first key scientific test of the seafloor spreading theory of continental drift and Plate tectonics .
 Vine, Matthews, Morley, Morley, Vine, Matthews
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vine, Matthews, Morley, Morley, Vine, Matthews