What concepts are described in the following sentence?

"Frank de Boer once played for Al-Shamal Sports Club and the Netherlands national football team. He is now attached to FC Barcelona while managing AFC Ajax."

Return the answer as pairs of triples.
AFC Ajax MANAGER Frank de Boer
Frank de Boer CLUB Al-Shamal Sports Club
Frank de Boer CLUB FC Barcelona
Frank de Boer CLUB Netherlands national football team