Complex sentence: She had two sisters, Betsie ten Boom (died 1944 in the Ravensbrück death camp) and Nollie (died in 1953); her brother, Willem ten Boom, was born in 1887 and died in 1946 of spinal tuberculosis.
Split into simpler sentences: She had two other sisters, Betsie ten Boom (died 1944 in the Ravensbrück death camp) and Nollie (died in 1953). Her brother, Willem ten Boom, was born in 1887 and died in 1946 of spinal tuberculosis.