Update README.md

README.md

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 # BridgeTower base-itm-mlm model
 
 The BridgeTower model was proposed in [BridgeTower: Building Bridges Between Encoders in Vision-Language Representative Learning] by Xiao Xu, Chenfei Wu, Shachar Rosenman, Vasudev Lal, Wanxiang Che, Nan Duan. 
-The model was pretrained model on English language using masked language modeling (MLM) and image text matching (ITM)objectives. It was introduced in
+The model was pretrained on English language using masked language modeling (MLM) and image text matching (ITM)objectives. It was introduced in
 [this paper](https://arxiv.org/pdf/2206.08657.pdf) and first released in
 [this repository](https://github.com/microsoft/BridgeTower).