Sentence:  The event was a BBQ in the peaceful and picturesque System Garden at the University of Melbourne, Parkville campus. Food was plentifil and included a variety of sausages and veggie burgers, onions, bread and <WSD>tomato sauce</WSD> in addition to soft drinks. 
Meaning of the word marked with <WSD> tags:  Tomato ketchup, used as a condiment.