how many company were founded in the same year as campeonato nacional de juniores ?
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_Campeonato_Nacional_de_Juniores dbo_foundingYear var_year sep_dot dbr_Campeonato_Nacional_de_Juniores a dbo_Companybrack_close