You will be given a definition of a task first, then some input of the task.
In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Which expansion project happened the soonest after the middle of the 1940's?, Context: In 1922, the number of supporters had surpassed 20,000 and by lending money to the club, Barça was able to build the larger Camp de Les Corts, which had an initial capacity of 20,000 spectators. After the Spanish Civil War the club started attracting more members and a larger number of spectators at matches. This led to several expansion projects: the grandstand in 1944, the southern stand in 1946, and finally the northern stand in 1950. After the last expansion, Les Corts could hold 60,000 spectators.
Output:
the southern stand