Task: Question Generation
Input (English): We investigate the following six idiom resources:

Wiktionary;

the Oxford Dictionary of English Idioms (ODEI, BIBREF31);

UsingEnglish.com (UE);

the Sporleder corpus BIBREF10;

the VNC dataset BIBREF9;

and the SemEval-2013 Task 5 dataset BIBREF15.
Output (English): What dictionaries are used for automatic extraction of PIEs?