11482
The Missouri River valley had historically been a major migration corridor for birds , however , the channelization of the river and destruction of wetlands has led to a marked decline .
 location: Missouri River
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:
 location: Missouri River