9857
Alfred Watkins , in his classic work on ley lines " The Old Straight Track " , used the width of a pencil line on a map as the threshold for the tolerance of what might be regarded as an alignment .
 person: Alfred Watkins; media: The Old Straight Track
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Alfred Watkins; media: The Old Straight Track