Simplify the following text for a Grade 9 native English-speaking person.
Original: The first widely known ski jumping competition was the Husebyrennene , held in Oslo in 1879 , with Olaf Haugann of Norway setting the first world record for the longest ski jump at 20 metres .
Simplified: The first widely known ski jumping competition was held in Oslo in 1879 , with Olaf Haugann of Norway setting the first world record for the longest ski jump at 20 metres