We present an unsupervised approach to build a lexicon of Arabic Modal Multiword Expressions (AM-MWEs) and a repository of their variation patterns. These novel resources are likely to boost the automatic identification and extraction of AM-MWEs 1 .
We present an interactive procedure to annotate a large-scale corpus of Modern Standard and Egyptian Arabic tweets for event modality that comprises obligation, permission, commitment, ability, and volition. The procedure splits up the annotation process into a series of simplified questions, dispenses with the requirement of expert linguistic knowledge, and captures nested modality triggers and their attributes semi-automatically.
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