<prompt> Translate the following text to EnglishKenneth MacAlpin, ambaye alitawala kama mfalme wa Scotland huko Dunedin, alipata kiti cha enzi cha Pictish mwaka 843, na kuunganisha Scotland kaskazini mwa Mto Forth katika ufalme mmoja.  <response>: Kenneth MacAlpin, who ruled as king of Scots at Dunadd, acquired the Pictish throne in 843, uniting Scotland north of the River Forth into a single kingdom. 