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The first GAGAN transmitter was integrated into the GSAT-4 geostationary satellite , and had a goal of being operational in 2008 .
 location: GSAT-4
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: GSAT-4