Does Unyielding Spirit prevent damage from Caitlyn, Patrolling and Yasuo, Remorseful?

Ruling: Yes, Unyielding Spirit prevents damage from Caitlyn, Patrolling and Yasuo, Remorseful because their abilities use "Deal damage" with no subject, meaning the ability itself is dealing the damage.

Nuances:

• Abilities that say "Deal damage" with no subject (the ability/spell deals damage) are prevented by Unyielding Spirit
• Abilities that specify a subject like "I deal", "it deals", "they deal", or "we deal" mean the units are dealing the damage, not the ability, so Unyielding Spirit does not prevent them
• Challenge and Carnivorous Snapvine use "we deal" and "they deal" respectively, so those are not prevented
• Last Breath effects that say "It deals" are not prevented because the unit is dealing the damage