Complex sentence: Ramos et al., p.45-46 Her mother contracted Filaria, which limited her social and personal activities, therefore Saro, Ferré's older sister, became responsible for the upbringing of the younger children.
Split into simpler sentences: Ramos et al., p.45-46 She contracted Filaria, which limited her activities. Due to this, Ferré's older sister, Saro, became responsible for the upbringing of the younger children.