EU Lawmakers Lift Immunity Of 3 Catalan Separatists

Three individuals lost their immunity and are subject to European Arrest Warrants by Spain, which seeks their extradition for organizing a 2017 independence referendum deemed illegal.

What were the individuals subject to according to the text?

Which country issued the European Arrest Warrants?

What was the purpose of the extradition mentioned in the text?

What event were the individuals involved in that was deemed illegal?

In what year did the independence referendum take place?