Detailed Instructions: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Q: The War of Jenkins' Ear (known as Guerra del Asiento in Spain) was a conflict between Britain and Spain lasting from 1739 to 1748, with major operations largely ended by 1742. Its unusual name, coined by Thomas Carlyle in 1858, refers to an ear severed from Robert Jenkins, a captain of a British merchant ship. Despite stories to that effect, there is no evidence the severed ear was exhibited before the British Parliament.
A:
who were the opposing countries in the war of jenkins' ear