Simplify the following text for a Grade 8 native English-speaking person.
Original: Selections by the octopus were correct in four of Germany 's six Euro 2008 matches , and were correct in all seven of their matches in the 2010 World Cup .
Simplified: He did this correctly in four of Germany 's six Euro 2008 matches , and in all seven of their matches in the 2010 World Cup .