SlowGuess/NAACL_2022_OCR huggingface dataset:
examples from NQ that are most close to MLQuestions clustering center. We set number of clusters as 2 because we want to directly investigate the unsupervised separability between NQ and MLQuestions. We use the provided development set and the test set of MLQuestions. Then we perform domain adaptation for QG, and show results in Table 5. Compared with the self-training method explored in (Kulshreshtha et al., 2021), the proposed method in this paper achieves more performance increase, e.g. DDS+ST method achieved 5.42 and 4.7 net gain in Rouge-L and BLEU-1 score respectively, compared with 0.58 and 0.80 net gain with self-training in (Kulshreshtha et al., 2021). We focus on the self-training method in this paper, so we consider conducting open-domain retrieval-based methods like Back-Training in future research.
Table 9: Examples of selected data from NQ dataset that are most similar to RACE dataset (NQ→RACE) and SciQ dataset (NQ→RACE).
RACE	SciQ
Context	Jenny was a pretty five-year-old girl. One day when she and her mother were checking out at the grocery store, Jenny saw a plastic pearl necklace priced at $2.50. Her mother bought the necklace for her on condition that she had to do some homework to pay it off. Jenny agreed. She worked very hard every day, and soon Jenny paid off the necklace. Jenny loved it so much that she wore it everywhere except when she was in the shower. Her mother had told her it would turn her neck green! Jenny had a very loving daddy. When Jenny went to bed, he would read Jenny her favorite story. One night when he finished the story, he said, "Jenny, could you give me your necklace?" "Oh! Daddy, not my necklace!" Jenny said. "But you can have Rosy, my favorite doll. Remember her?	Gamma rays are produced when radioactive elements decay. Radioactive elements are elements with unstable nuclei. To become more stable, the nuclei undergo radioactive decay. In this process, the nuclei give off energy and may also emit charged particles of matter. Types of radioactive decay include alpha, beta, and gamma decay. In alpha and beta decay, both particles and energy are emitted. In gamma decay, only energy, in the form of gamma rays, is emitted.
Answer	She had to help her mother do some housework.	radioactive
w/o-UDA	what's the meaning of the name jenny?	where do gamma rays come from when they decay?
ST	what is the name of jenny's necklace?	what type of element is the source of gamma rays?
DDS+ST	how did jenny get her necklace in the movie?	what type of elements give off gamma rays?
Context	Lawmakers in the United States have expanded an investigation into the use of location-tracking systems on mobile devices. The action follows recent reports about the storing of information on the Apple iPhone. Some people consider location tracking to be a threat to personal privacy and security. Allan Friedman, the research director, says, "All wireless companies do some location tracking as part of their networks. This information is usually stored by the companies, not the devices, and there are laws to protect it. Law enforcement agencies, ... There's the idea that because it's on my phone and on my computer, rogue applications that I pay for or that I'm tricked into downloading may be able to access this data and somehow misuse it." Apple says it is "not tracking the location of your iPhone". It is simply keeping a database of Wi-Fi hotspots and cell phone towers near the user's location.	Not all wetlands are alike, as you can see below (Figure below). Wetlands vary in how wet they are and how much of the year they are soaked. Wet-lands also vary in the kinds of plants that live in them. This depends mostly on the climate where the wetland is found. Types of wetlands include marshes, swamps, and bogs.
Answer	Because it is thought to threaten users' privacy.	wetland
w/o-UDA	why is there a tracking system on my phone?	what do you call a place that is covered with water?
ST	why is there a location tracking system on apple?	what do you call marshes that are wet?
DDS+ST	why do we not use location tracking on iphone?	what are marshes and bogs called?
Table 10: Examples of generated questions with different methods.