Given a text passage, you need to generate a suitable title as the output. The output title should be one of the words/phrases used in the passage and must be no longer than five words. 
Example: Paragraph:  Concept work for Valkyria Chronicles III began after development finished on Valkyria Chronicles II in early 2010 , with full development beginning shortly after this . The director of Valkyria Chronicles II , Takeshi Ozawa , returned to that role for Valkyria Chronicles III . Development work took approximately one year . After the release of Valkyria Chronicles II , the staff took a look at both the popular response for the game and what they wanted to do next for the series . Like its predecessor , Valkyria Chronicles III was developed for PlayStation Portable : this was due to the team wanting to refine the mechanics created for Valkyria Chronicles II , and they had not come up with the " revolutionary " idea that would warrant a new entry for the PlayStation 3 . Speaking in an interview , it was stated that the development team considered Valkyria Chronicles III to be the series ' first true sequel : while Valkyria Chronicles II had required a large amount of trial and error during development due to the platform move , the third game gave them a chance to improve upon the best parts of Valkyria Chronicles II due to being on the same platform . In addition to Sega staff from the previous games , development work was also handled by Media.Vision. The original scenario was written Kazuki Yamanobe , while the script was written by Hiroyuki Fujii , Koichi Majima , Kishiko Miyagi , Seiki Nagakawa and Takayuki Shouji . Its story was darker and more somber than that of its predecessor . 
 The majority of material created for previous games , such as the BLiTZ system and the design of maps , was carried over . Alongside this , improvements were made to the game 's graphics and some elements were expanded , such as map layouts , mission structure , and the number of playable units per mission . A part of this upgrade involved creating unique polygon models for each character 's body . In order to achieve this , the cooperative elements incorporated into the second game were removed , as they took up a large portion of memory space needed for the improvements . They also adjusted the difficulty settings and ease of play so they could appeal to new players while retaining the essential components of the series ' gameplay . The newer systems were decided upon early in development . The character designs were done by Raita Honjou , who had worked on the previous Valkyria Chronicles games . When creating the Nameless Squad , Honjou was faced with the same problem he had had during the first game : the military uniforms essentially destroyed character individuality , despite him needing to create unique characters the player could identify while maintaining a sense of reality within the Valkyria Chronicles world . The main color of the Nameless was black . As with the previous Valkyria games , Valkyria Chronicles III used the CANVAS graphics engine . The anime opening was produced by Production I.G.   Question: what is the suitable title of the passage ?
Example solution:  Valkyria Chronicles
Example explanation:  It is clear from the passage that the answer is Valkyaria Chronicles, as it appears most frequently in the passage.

Problem: Paragraph:    Picturesque Children of the Allies ; J. Salmon , 1916 
 National Mission ; Society for the Preservation of Christian Knowledge , 1916 
 Shakespeare 's Boy Characters ; C. W. Faulkner , 1917 
 Shakespeare 's Girl Characters ; C. W. Faulkner , 1920 
 Seaside Holiday ; J. Salmon , 1918 , 1921 
 Elves and Fairies ; S. Harvey , 1918 
 Guardian Angel ; Society for the Preservation of Christian Knowledge , 1923 
 Christmas cards ; Girls ' Friendly Society , 1920s , 1930s 
 Christmas cards ( US ) ; Barton @-@ Colton , 1920s , 1930s 
 Beautiful Bible Pictures ; Blackie , 1932   Question: what is the suitable title of the passage ?
Solution:  Cards