Autism spectrum disorder ( ASD ) is a range of complex neurodevelopmental disorders , characterized by social impairments , communication difficulties , and restricted , repetitive , and stereotyped patterns of behavior ( NINDS , 2014 ) .
NOUN VERB NOUN ( PROPN ) AUX DET NOUN ADP ADJ ADJ NOUN , VERB ADP ADJ NOUN , NOUN NOUN , CCONJ VERB , ADJ , CCONJ VERB NOUN ADP NOUN ( PROPN , NUM ) .