CREATE TABLE table_67479 ("Name" TEXT, "Discovered" FLOAT, "Museum" TEXT, "Museum city" TEXT, "Discoverer" TEXT, "Formation" TEXT, "Location" TEXT)

Who discovered the specimen at the Burpee Museum of Natural History?
SELECT "Discoverer" FROM table_67479 WHERE "Museum" = 'burpee museum of natural history'
SELECT "Discoverer" FROM "table_67479" WHERE "Museum" = 'burpee museum of natural history'