Joining the Dots: Efficient Joins Over Parent-Child Ordered Postings Lists. - Karthikeyan Ramasamy; Yupeng Fu; Jinny Jingyu Wang; Philip Chan; Tejas Naik; George Zhai; Shubham Gupta; Saurabh Kathpalia; Noah Schlager; Kamyar Arbabifard; Sandhya Sainath; Kunal Veera; et al. (IEEE Big Data, 2025)