what is the main common interests of the syed waheed ashraf and izz al-din ibn 'abd al-salam ?
SELECT DISTINCT var_uri where brack_open dbr_Syed_Waheed_Ashraf dbp_mainInterests var_uri sep_dot dbr_Izz_al-Din_ibn_'Abd_al-Salam dbp_mainInterests var_uri brack_close