<page_title> Sergey Bubka </page_title> <section_title> IAAF World championships </section_title> <table> <cell> 1983 <col_header> Year </col_header> </cell> <cell> World Championships <col_header> Competition </col_header> </cell> <cell> Helsinki <col_header> Venue </col_header> </cell> <cell> 1st <col_header> Position </col_header> </cell> </table>
In 1983, Sergey Bubka won the world championship in Helsinki.