Using the DUC 2003 training data, we tuned α and λ on a small grid (α ∈ {0.125, 0.25, 0.5, 1.0}; λ ∈ {0.0, 0.0625, 0.125, 0.25, 0.5, 0.95}).
for each of the 30 DUC 2003 Task 2 document sets, we computed ROUGE-1 scores comparing our generated summary to 4 model summaries.