Since large amounts of text are used for language model training, such systems often do not incorporate pitch information for speech recog-nition of tonal languages (Metze et al., 2013), as they can instead rely on contextual information for tonal disambiguation via the language model (Le and Besacier, 2009;Feng et al., 2012) even though there is no computational burden in additionally using pitch features.
as for the sister, she stayed at home.