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He also remained a regular center-back for the upcoming years , forming a solid defensive duo with Martin Škrtel ( for a majority of his career - both players debuting in the same match ) .
 person: Martin Škrtel
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Martin Škrtel