Complex sentence: ONCE lottery tickets are sold on the streets by authorised "cupón" sellers, as well as in ONCE kiosks, which are clearly identified by the word "ONCE", and can be found along the high street, at airports, and in shopping malls.
Split into simpler sentences: ONCE lottery tickets are sold on the streets by authorised "cupón" sellers, as well as in ONCE kiosks. These are clearly identified by the word "ONCE" and can be found along the high street, at airports, and in shopping malls.