Question: Lady Margarita Elizabeth Rose Alleyne Armstrong-Jones is the only daughter of an English furniture maker who is 18th in line of succession to what?  
Sentence (from "Lady Margarita Armstrong-Jones"): Lady Margarita Elizabeth Rose Alleyne Armstrong-Jones (born 14 May 2002) is the only daughter and youngest child of the Earl and Countess of Snowdon.
Relevant evidence: Yes