question: What is the population in millions for 2011 where the HDI for 2011 is 0.453 (low)?
answer: SELECT population__millions, _2011_ FROM table_2155836_1 WHERE hdi__2011_ = "0.453 (low)"
context: CREATE TABLE table_2155836_1 (population__millions VARCHAR, _2011_ VARCHAR, hdi__2011_ VARCHAR)