LONDON (ShareCast) - Premier Oil (LSE: PMO.L - news ) rallied after Jefferies upgraded the stock to 'buy' from 'hold' and raised the price target to 185p from 170p, on the basis of "continued operational delivery in 2H15".
What is the relationship between 'Premier Oil' and 'LONDON' in the context of the input sentence.
Options: headquarters location, creator, distribution format, stock exchange