However, 55 per cent said they considered it a substitute for Diet Coke and Coke Zero, suggesting that the new brand will cannibalise sales of low-calorie colas rather than generate incremental sales growth and restore volume growth to the brand, as Coca-Cola Amatil hopes.
Analyze the relationship between 'Diet Coke' and 'Coca-Cola' within the context of the input sentence.
Options: owned by, brand, industry, manufacturer