117646
Work began on this route , with some track laid in the Leader River valley , but World War I brought a halt to construction , and when work resumed , a more easterly , coastal route was chosen instead .
 location: Leader River; event: World War I
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Leader River, World War I 
Answer:
 location: Leader River; event: World War I