Before revision:  Due to the difficulty and high cost of data collection, the supervised data available in the two fields are usually on the magnitude of tens of thousands, for example, 18K in the WebNLG dataset , which is far fewer than the millions of data for other tasks such as machine translation.
After revision:  Due to the difficulty and high cost of data collection, the supervised data available in the two fields are usually on the magnitude of tens of thousands, for example, 18K in the WebNLG ~2017 dataset after preprocessing , which is far fewer than the millions of data for other tasks such as machine translation.