Simplify the following text for a Grade 7 native English-speaking person.
Original: The Nilotic ethnic groups , probably an offshoot of the Acholi , appear to have crossed Lake Victoria to reach their present home , the country around Kavirondo Gulf .
Simplified: The Nilotic tribes are probably an offshoot of the Acholi . They appear to have crossed the lake to reach their current home , the country around Kavirondo Gulf .