This tests array_filter for all question types that can be filtered.
Change the type of first question (f1) to demonstrate that each of the following types of questions can trigger filtering of the other questions:
Multiple choice with comments
Multiple short text
Array (5 point, 10 point, Yes/No/Unknown, Increase/Same/Decrease, Column)
Array (Dual Scale, Text, Numbers)
There are 113 questions in this survey.