Updated regressions log
@@ -6,8 +6,10 @@ This documentation is useful for figuring why results may have changed over time
### August 9, 2019
+ commit [`1217d47`](https://github.com/castorini/anserini/commit/1217d475c88cc4782ff3056506afc43d71bf31fb) (8/9/2019)
++ commit [`75dfaa6`](https://github.com/castorini/anserini/commit/75dfaa6989ed36f76422d7be0d9d424d85705ee3) (8/9/2019)
Added new Doc2query regression `car17v2.0-doc2query` to replicate [Nogueira et al. (arXiv 2019)](https://arxiv.org/abs/1904.08375) on the TREC 2017 Complex Answer Retrieval (CAR) section-level passage retrieval task (v2.0).
+Added +Ax and +PRF regressions with both tuned and default BM25 parameters for MS MARCO passage ranking task.
### August 5, 2019
