Sentence:  There was a teacher who taught children to read under a <WSD>calabash</WSD> tree, and this teacher's name was Goso. 
Meaning of the word marked with <WSD> tags:  A tree (known as the calabash tree; "Crescentia cujete") native to Central and South America, the West Indies, and southern Florida, bearing large, round fruit used to make containers "(sense 3)"; the fruit of this tree.