question:  Why did Svan smile when he was getting ready to leave them?
context: Svan was the leader making the final plans—plotting them a bit too well. The Officer of the Deck was pleased as he returned to the main lock. The Executive Officer was moodily smoking a cigarette in the open lock, staring out over the dank Venusian terrain at the native town. "Everything shipshape, I take it!" "Every man accounted for except the delegation, cargo stowed, drivers ready to lift as soon as they come back." But after all, they're human beings, just like us—" "Not any more. Four or five generations ago they were. "They had to acclimate themselves to Venus's climate. He stared at the wooden shacks that were the outskirts of the native city, dimly visible through the ever-present Venusian mist. The native guard of honor, posted a hundred yards from the Earth-ship, stood stolidly at attention with their old-fashioned proton-rifles slung over their backs. A few natives were gazing wonderingly at the great ship, but made no move to pass the line of guards. They think there will be hordes of immigrants from Earth, now that we know Venus is habitable. And there's some sort of a paltry underground group that is spreading the word that the immigrants will drive the native Venusians—the descendants of the first expedition, that is—right down into the mud. That's a basic law of—" The annunciator over the open lock clanged vigorously, and a metallic voice rasped: "Officer of the Deck! "From their own mouths you have heard it. Svan laughed harshly. " "Then we must act. We have agreed that, if the Earth-ship returns, it means disaster for Venus. Therefore, it must not return." "The Council did not know what we would face. Abruptly he set the bomb down, savagely ripped six leaves off a writing tablet on the table next him. There will be danger, I think...."
output:  He was glad the others were going to blow up soon
options:  He knew they would be safe, since he was doing the dangerous job  He was glad the others were going to blow up soon  He was excited to follow through with his plan  He had feelings for Ingra