Complex sentence: Derventa's first football club was formed in 1919 under the name "FK Dečko", several other sports associations formed in Derventa prior to the outbreak of the Second World War.
Split into simpler sentences: Derventa's first football club was formed in 1919 under the name "FK Dečko". Several other sports associations formed in Derventa prior to the outbreak of the Second World War.