Complex sentence: Though Shared Belief is also based in California, the two have never raced against each other, though racing pundits noted that both California-based horses had unusual training programs in that neither was housed at Santa Anita.
Split into simpler sentences: Though Shared Belief is also based in California, the two have never raced against each other. Racing pundits noted that both California-based horses had unusual training programs for that part of the country, as neither was based at Santa Anita.