Sentence:  For instance, one day we were sitting on the porch, looking down at the lagoon and the yachts from all over the world. He was drinking ginger beer mixed with rum, and I was drinking <WSD>sorrel</WSD>. No rum. Out of nowhere, he proposed. 
Meaning of the word marked with <WSD> tags:  A drink, consumed especially in the Caribbean around Christmas, made from the flowers of (ver=181018): (hibiscus tea).