Sentence:  I wandered lonely as a Cloud / That floats on high o'er Vales and Hills, / When all at once I saw a crowd / A host of dancing <WSD>Daffodills</WSD>; / Along the Lake, beneath the trees, / Ten thousand dancing in the breeze. 
Meaning of the word marked with <WSD> tags:  A bulbous plant of the genus "Narcissus", with yellow flowers and a trumpet shaped corona, especially (ver=161010), the national flower of Wales.