private static String generateNewsPaperText(
List<Knowledge> knowledgeList, int[] knowledgeIndices, World world) {
StringBuilder builder = new StringBuilder();
KnowledgeToDescriptionMapper mapper = new KnowledgeToDescriptionMapper();
List<Integer> knowledgeInts =
IntStream.of(knowledgeIndices).boxed().collect(Collectors.toList());
for (int i = 0; i < knowledgeList.size(); i++) {
Knowledge knowledge = knowledgeList.get(i);
if (knowledgeInts.contains(knowledge.getId())) {
builder.append(mapper.getStatementDescription(knowledge, world)).append(". ");
}
}
return builder.toString();
}