Sentence:  A particularly <WSD>poignant</WSD> example of this is a child called Genie (see Curtiss 1977; Rymer 1993), who was deprived of speech input and kept locked up on her own in a room until age thirteen. When eventually taken into care and exposed to intensive language input, her vocabulary grew enormously, but her syntax never developed. 
Meaning of the word marked with <WSD> tags:  Evoking strong mental sensation, to the point of distress; emotionally moving.