2022 PGIF Policy Gradients Incorporating the Future David Venuto, Elaine Lau, Doina Precup, and 1 more author ICLR 2022 HTML PDF DeepVent Policy Gradients Incorporating the Future Flemming Kondrup, Thomas Jiralerspong, Elaine Lau, and 4 more authors RLDM 2022 HTML PDF 2021 Long-PEGASUS Abstractive Summarization using Longformer-PEGASUS Akila Jeeson-Daniel, Curtis Lin, and Elaine Lau 2021 PDF Long-PEGASUS Abstractive Summarization using Longformer-PEGASUS Akila Jeeson-Daniel, Curtis Lin, and Elaine Lau 2021 PDF