What is the fine-grained topic of the following text: A paper on L2 acquisition of English wh-questions and syntactic constraints by PhD alumnus Sujeewa Hettiarachchi and professor Acrisio Pires is now available in the proceedings of the 6th GALANA Generative Approaches to Language Acquisition in North America. Only return the topic.
L2 acquisition of English wh-questions and syntactic constraints