Head change for copula
In the conversion from UD to SUD, it is not possible to fully automate the choice of dependents to be transferred from the old head to the new one. If we adopt as a default rule that a modifier of the governor of the copula does not move, we obtain errors in the following cases.
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fr-ud-train_12046 - Le dessert était bon d'après ma femme
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fr-ud-train_00390 - L'espérance de vie de la population dans le monde était d'un peu plus de 45 ans en 1950 ;
In the examples above, the complements d'après ma femme and en 1950 depend on the head of the sentence, which is the copula in SUD.
If we adopt the opposite rule as a default rule (a modifier of the governor of the copula moves), we obtain an error in the following case.
- Europar.550_00419 - … l'utilisateur, pour lequel le prix du billet d'avion sera plus élevé
In the example above, pour lequel depends on élevé, regardless of the head of the sentence, and the relation does not move with the head change.