Complex sentence: George Bertram is the son of an improvident army officer; because of his father's irresponsibility, the cost of his upbringing is grudgingly borne by his wealthy paternal uncle, also named George Bertram.
Split into simpler sentences: George Bertram is the son of an improvident army officer. Because of his father's irresponsibility, the cost of his upbringing is grudgingly borne by his wealthy paternal uncle, also named George Bertram.