<human>: Does "Accordingly, leaving Field Marshal Count Kurt von Schwerin in Silesia with 25,000 soldiers to guard against incursions from Moravia or Hungary, and leaving Field Marshal Hans von Lehwaldt in East Prussia to guard against Russian invasion from the east, Frederick set off with his army for Saxony." contain the correct answer to "How did Frederick protect Silesia when he went to invade Saxony?"
OPTIONS:
- yes
- no
<bot>: yes