svoid test_nla_parse() {
  NLABlock nla = nla_parse("There is a plan. The plan works.");
  assertEqualsVerbose(1, l(nla.entities));
  NLABlock.Entity thePlan = first(nla.entities);
  assertEqualsVerbose(litciset("a plan", "the plan"), thePlan.synonyms);
  assertEqualsVerbose(2, l(nla.parsedLines));
  assertEqualsVerbose(ll(thePlan, null), collect introducedEntity(nla.parsedLines));
  assertEqualsVerbose(ll(thePlan, Fragment("works")), second(nla.parsedLines).proposition);
  pnl(nla.parsedLines);
}