Customers wait in line while the workers in green shirts help them.
Klanten wachten in de rij terwijl de werknemers in groene shirts hen helpen.
The people in green shirts are helping the customers.
De mensen in groene shirts helpen de klanten.
The workers in green shirts help them  implies workers are helping customers.
De werknemers in groene shirts helpen hen impliceert werknemers helpen klanten.