Complex sentence: Gallant left journalism in 1950 to pursue fiction writing fulltime; her first internationally published short story, "Madeline's Birthday", appeared in "The New Yorker" in 1951.
Split into simpler sentences: Gallant left journalism in 1950 to pursue fiction writing fulltime. Her first internationally published short story, "Madeline's Birthday", appeared in "The New Yorker" in 1951.