Niraj Shrestha


Semi-automatically Alignment of Predicates between Speech and OntoNotes data
Niraj Shrestha | Marie-Francine Moens
Proceedings of the Tenth International Conference on Language Resources and Evaluation (LREC'16)

Speech data currently receives a growing attention and is an important source of information. We still lack suitable corpora of transcribed speech annotated with semantic roles that can be used for semantic role labeling (SRL), which is not the case for written data. Semantic role labeling in speech data is a challenging and complex task due to the lack of sentence boundaries and the many transcription errors such as insertion, deletion and misspellings of words. In written data, SRL evaluation is performed at the sentence level, but in speech data sentence boundaries identification is still a bottleneck which makes evaluation more complex. In this work, we semi-automatically align the predicates found in transcribed speech obtained with an automatic speech recognizer (ASR) with the predicates found in the corresponding written documents of the OntoNotes corpus and manually align the semantic roles of these predicates thus obtaining annotated semantic frames in the speech data. This data can serve as gold standard alignments for future research in semantic role labeling of speech data.


Key Event Detection in Video using ASR and Visual Data
Niraj Shrestha | Aparna N. Venkitasubramanian | Marie-Francine Moens
Proceedings of the Third Workshop on Vision and Language


Named Entity Recognition in Broadcast News Using Similar Written Texts
Niraj Shrestha | Ivan Vulić
Proceedings of the Student Research Workshop associated with RANLP 2013