you might want to search based on the predicate, or you might have versioned triples where the predicate changes in one version, you have these two ideas repre

you might want to search based on the predicate, or you might have versioned triples where the predicate changes in one version, you have these two ideas represented: [bob,likes,cake] [ann,suspects,[bob, likes, cake]] this may change in another version: [bob,likes,cake] [ann,knows,[bob,likes,cake]] a decent triple store will allow you to version these ideas and explore how they change over time, or maybe query by predicate