304647
Professional career 2000-2007 Marrero earned his first world ranking late in 2000 as a 20 year old , but he spent only a few weeks inside the top-500 until early 2005 .
 Marrero
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marrero