Complex sentence: Thus, much of Loraine Wyman's youth ended up being spent in Paris, where she learned the French language and developed a sense of connection to France and its people--manifested in her later fundraising efforts during the First World War (see below).
Split into simpler sentences: Thus, much of Loraine Wyman's youth ended up being spent in Paris. There, she learned the French language and developed a sense of connection to France and its people--manifested in her later fundraising efforts during the First World War (see below).