Simplify the following text for a Grade 4 native English-speaking person.
Original: However , Maraamu protested , saying Robert was not around when Rotu made their flag . Jeff agreed , and also found out that Rotu 's boat was not brought back close enough to their chain , while Maraamu 's boat was okay .
Simplified: While Maraamu only sent down one or two people at a time , Rotu went down in groups .