Manifesto

"Grammatical tautology" is the subject of this sentence.
Simultaneously, it is also the subject of the previous sentence.
The predicate of the prior sentence is also the subject of the previous sentence.
Therefore, the subject of the previous sentence is the predicate of the prior sentence.
Conversely, the subject of this sentence is the predicate of the first sentence
though the predicate of the second sentence is the subject of the previous sentence.
Likewise, the predicate of the third sentence is the subject of the previous sentence
while the predicate of the fourth sentence is still the predicate of the prior sentence.
The subject of the fifth sentence is always the subject of this sentence.
Therefore, the predicate of this sentence is the object of the proposition.