how many companies were founded by the founder of société provençale de constructions aéronautiques ?
select attr_open count attr_open distinct var_uri attr_close as var_c attr_close where brack_open dbr_Société_Provençale_de_Constructions_Aéronautiques dbo_foundedBy var_y sep_dot var_uri dbo_foundedBy var_y sep_dot brack_close