How many years have the home town of Baton Rouge, LA?
{'header': ['Name', '#', 'Position', 'Height', 'Weight', 'Year', 'Home Town', 'High School'], 'page_title': "1977–78 Texas Longhorns men's basketball team", 'page_id': '', 'types': ['text', 'real', 'text', 'text', 'real', 'text', 'text', 'text'], 'id': '1-12032893-1', 'section_title': 'Roster', 'caption': 'Roster', 'rows': [['Ron Baxter', '12', 'Guard-Forward', '6–4', '205', 'Sophomore', 'Los Angeles, CA', 'Dorsey'], ['Brent Boyd', '4', 'Guard', '6–3', '185', 'Sophomore', 'Baton Rouge, LA', 'Catholic University'], ['Tyrone Brayan', '31', 'Forward', '6–7', '220', 'Junior', 'Placentia, CA', 'El Dorado'], ['Rob Cunningham', '35', 'Forward-Center', '6–8', '215', 'Freshman', 'Westport, CT', 'Staples'], ['John Danks', '32', 'Forward', '6–6', '190', 'Sophomore', 'Beaver Dam, KY', 'Ohio County'], ['Ovie Dotson', '15', 'Guard', '6–5', '200', 'Junior', 'San Antonio, TX', 'Sam Houston'], ['Gary Goodner', '42', 'Forward', '6–7', '220', 'Senior', 'Denton, TX', 'Denton'], ['Henry Johnson', '33', 'Forward', '6–6', '190', 'Freshman', 'Los Angeles, CA', 'Manual Arts'], ['Jim Krivacs', '11', 'Guard', '6–1', '160', 'Junior', 'Indianapolis, IN', 'Southport'], ['John Moore', '0', 'Guard', '6–1', '170', 'Junior', 'Altoona, PA', 'Altoona'], ['Mike Murphy', '41', 'Forward', '6–8', '215', 'Senior', 'Austin, TX', 'Crockett'], ['Tom Nichols', '55', 'Center', '6–10', '230', 'Senior', 'Houston, TX', 'Sharpstown'], ['Dave Shepard', '44', 'Guard', '6–4', '205', 'Freshman', 'Los Angeles, CA', 'Manual Arts'], ['Keith Stephens', '52', 'Forward', '6–8', '210', 'Freshman', 'Pasadena, CA', 'Pasadena']], 'name': 'table_12032893_1'}