Text: Riding the crest of this economic upsurge were the zaibatsu conglomerates a dozen family-run combines, each involved in mining, manufacturing, marketing, shipping, and banking.
Entailment: Riding this economic upsurge were the zaibatsu conglomerates who were involved in mining, manufacturing, and other industries.
Contradiction: The zaibatsu fell with this recession and their industries collapsed.