Derivation Tree: SO: book, Input: [n!case,[the,d]] 1 esm SO: {book,n!case}, Input: [[the,d]] 1 1 dws SO: the, Input: [d] 1 2 ism SO: {book,{book,n!case}}, Input: [[the,d]] 1 3 ism SO: {n!case,{book,n!case}}, Input: [[the,d]] 1 4 ipm SO: <{book,n!case},book>, Input: [[the,d]] 1 5 ipm SO: <{book,n!case},n!case>, Input: [[the,d]] 2 epm SO: , Input: [[the,d]] 2 1 dws SO: the, Input: [d] 3 epm SO: , Input: [[the,d]] 3 1 dws SO: the, Input: [d] Nodes: 11 Dead: 0 MergeR: 0 Unlabeled: 0 Itf: 0 Found: 0 Queue: 7