66. The system of claim 65 wherein the global movement component is configured to determine whether each child node is to be moved to depend from a different ancestor node and, if so, re-ordering the child node to depend from the different ancestor node.
66. The system of claim 65 wherein the global movement component is configured to determine whether each child node is to be moved to depend from a different ancestor node and, if so, re-ordering the child node to depend from the different ancestor node. 70. The system of claim 66 wherein the global movement component is configured to identify nodes representative of relative pronouns in the tree structure that are not dominated by another relative clause and to determine whether the identified node has an ancestor node that represents a relative clause and, if so, move the identified node to depend from the ancestor node.