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He designed several bridges over the Mississippi River , as well as smaller bridges such as the Benton Street Bridge , and was a pioneer in the design of welded plate girder bridge s. The single-story ranch house , built from stone and concrete , shows Prairie School influence in the way it was incorporated into its location alongside the Iowa River .
 location: Iowa
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: Iowa 
Answer:
 location: Iowa