string: Competitors We compared the proposed SLST model with five state-of-the-art alternative detection approaches: (1) Faster R-CNN [24]: A competitive region proposal driven object detection model which is characterised by jointly learning region proposal generation and object classification in a single deep model In our scalable webly learning context, the Faster R-CNN is optimised with synthetic training data generated by the SCL [32] method, exactly the same as our SLST model.