Complex sentence: A note came with the infant saying she was to be taken to a nunnery in Vienna, when Ellie and Sigrid find that they are in quarintine for typhus, they decided to take the baby and raise her as their own.
Split into simpler sentences: A note came with the infant saying she was to be taken to a nunnery in Vienna. When Ellie and Sigrid find that the nunnery is in quarantine for typhus, they decide to take the baby and raise her as their own.