Please answer a question about the following article about American Idol:

The wildcard round returned in season eight, wherein there were three groups of twelve, with three contestants moving forward – the highest male, the highest female, and the next highest-placed singer - for each night, and four wildcards were chosen by the judges to produce a final 13. Starting season ten, the girls and boys perform on separate nights. In seasons ten and eleven, five of each gender were chosen, and three wildcards were chosen by the judges to form a final 13. In season twelve, the top twenty semifinalists were split into gender groups, with five of each gender advancing to form the final 10. In season thirteen, there were thirty semifinalists, but only twenty semifinalists (ten for each gender) were chosen by the judges to perform on the live shows, with five in each gender and three wildcards chosen by the judges composing the final 13.

How many wildcard contestants were chosen?
four