Complex sentence: She is reported to have been taken to the infamous ESMA torture centre, and from there on one of the "death flights" to the middle of the ocean; during these flights, the abducted were drugged, stripped and flung into the sea.
Split into simpler sentences: She is reported to have been taken to the infamous ESMA torture centre, and from there on one of the "death flights" to the middle of the ocean. During these flights, the abducted were drugged, stripped and flung into the sea.