Task: Sentence Expansion
Input (English): First , they can compete when males use their antlers as weapons to compete for mates ; second , they can compete where males present their antlers to display their strength and fertility .
Output (English): First , they can compete behaviorally where males use their antlers as weapons to compete for access to mates ; second , they can compete physiologically where males present their antlers to display their strength and fertility competitiveness to compete for access to mates .