5587
Soon after the novel opens , their 500-strong band -- inspired by the call to arms of Texas ' president , Sam Houston -- heads for the Rio Grande , preparing a sortie to avenge an attack on San Antonio by Mexican marauders .
 location contains: Texas, San Antonio; location contains: Texas, Rio Grande
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Texas, San Antonio; Texas, Rio Grande 
Answer:
 location contains: Texas, San Antonio; location contains: Texas, Rio Grande