Update README.md

Author: jwyang

README.md

@@ -47,7 +47,7 @@ source  | backbone | model | bs | lr  | lr_decay | max_iter | mAP@0.5 | mAP@0.50
 --------|--------|--------|:------:|:------:|:-------:|:------:|:------:|:------:
 [this repo](https://drive.google.com/open?id=1THLvK8q2VRx6K3G7BGo0FCe-D0EWP9o1) | Res-101 | faster r-cnn | 6 | 5e-3 | 70k,90k | 100k | 24.8 | 12.8
 
-### Scene Graph Generation
+### Scene Graph Generation (Joint training)
 source | backbone | model | bs | lr | lr_decay | max_iter | sgdet@20 | sgdet@50 | sgdet@100
 -------|--------|--------|:------:|:-------:|:------:|:------:|:------:|:-------:|:-------:
 [this repo](https://drive.google.com/open?id=1Vb-gX3_OLhzgdNseXgS_2DiLmJ8qiG8P) | Res-101 | vanilla | 6 | 5e-3 | 70k,90k | 100k | 10.4 | 14.3 | 16.8