Complex sentence: Holguín is the capital of the Cuban Province Holguín and was presumably founded as San Isidoro de Holguín in 1545 named after its founder García de Holguín.
Split into simpler sentences: Holguín is the capital of the Cuban Province Holguín. It was founded as San Isidoro de Holguín in 1545, and it is named after its founder García de Holguín.