Before revision:  To tackle these issues, we propose SPADE\spadesuit (SPatial DEpendency parser) , an end-to-end spatial dependency parser that is serializer-free and capable of modeling an arbitrary number of information layers , making it suitable for parsing structure-rich documents such as receipts and multimodal documents such as name cards.
After revision:  To tackle these issues, we propose SPADE\spadesuit (SPatial DEpendency parser) , an end-to-end spatial dependency parser that is serializer-free and capable of modeling an arbitrary number of information layers in the documents in an end-to-end manner. We evaluate it on various kinds of documents such as receipts and multimodal documents such as name cards.