Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

In accordance with the order of succession in the Nigerian constitution following President Umaru Yar 'Adua 's death on 5 May 2010 , acting President Goodluck Jonathan was sworn in as the substantive President of the Federal Republic of Nigeria on 6 May 2010 , becoming Nigeria 's 14th Head of State .
Jonathan was sworn in as Yar 'Adua 's replacement on 6 May 2010 , becoming Nigeria 's 14th Head of State .