Input (grade 11): In 1972 Mali, Mauritania and Senegal founded the Organisation pour la mise en valeur du fleuve SÃ nÃ gal (OMVS) to manage the river basin.
Output (grade 9): In 1972, Mali, Mauritania and Senegal made the Organisation pour la mise en valeur du fleuve SÃ nÃ gal (OMVS).