Complex sentence: The census also shows that they are virtually matched for sex and they have a predominantly young population: 63% had at that time less than 30 years, all African descent speak Guarani, like the rest of the Paraguayans.
Split into simpler sentences: The census also shows that they are virtually matched for sex and they have a predominantly young population: 63% had at that time were under 30 years old. All those of African descent speak Guarani, like the rest of the Paraguayans.