question: Name the sum of population 1.1.2008 for tønsberg and population 1.1.2006 more than 45.447
answer: SELECT SUM(population_112008) FROM table_name_62 WHERE urban_area = "tønsberg" AND population_112006 > 45.447
context: CREATE TABLE table_name_62 (population_112008 INTEGER, urban_area VARCHAR, population_112006 VARCHAR)