 The concept of a professional lifeguard is unknown on Ibiza and Formentera alike; some beach bars do keep first-aid supplies.
The professional lifeguard was born out of the beaches of Ibiza.
mnli hypothesis: The professional lifeguard was born out of the beaches of Ibiza. premise:  The concept of a professional lifeguard is unknown on Ibiza and Formentera alike; some beach bars do keep first-aid supplies.