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A " pure " abjad is exemplified ( perhaps ) by very early forms of ancient Phoenician , though at some point ( at least by the 9th century BC ) it and most of the contemporary Semitic abjads had begun to overload a few of the consonant symbols with a secondary function as vowel markers , called " matres lectionis " .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None