how many company were founded in the same year as warner norcross & judd ?
select attr_open count attr_open distinct var_uri attr_close as var_c attr_close where brack_open var_uri rdf_type dbo_Company sep_dot var_uri dbo_foundingYear var_year sep_dot dbr_Warner_Norcross_&_Judd dbo_foundingYear var_year sep_dot dbr_Warner_Norcross_&_Judd a dbo_Companybrack_close