Complex sentence: Otto developed land in Lewiston, Michigan owned by Garland Manufacturing into a major resort, which he opened in 1951, naming it, after Harry Garland, the Garland Lodge and Resort.
Split into simpler sentences: Otto developed land owned by Garland Manufacturing in Lewiston, Michigan into a major resort which opened in 1951. Otto named it, after Harry Garland, the Garland Lodge and Resort.