Task: Question Answering
Input (English): While the neural syntax-agnostic system obtains superior performance on the L1 data, the two syntax-based systems both produce better analyses on the L2 data. Furthermore, as illustrated in the comparison between different parsers, the better the parsing results we get, the better the performance on L2 we achieve. This shows that syntactic parsing is important in semantic construction for learner Chinese. The main reason, according to our analysis, is that the syntax-based system may generate correct syntactic analyses for partial grammatical fragments in L2 texts, which provides crucial information for SRL. 
 Question: Do the authors suggest why syntactic parsing is so important for semantic role labelling for interlanguages?
Output (English): syntax-based system may generate correct syntactic analyses for partial grammatical fragments