48558
From mid-December to mid-March , when thousands of California gray whales pass by San Diego on their annual southern migration to the warm breeding grounds of Baja California , trained naturalists lead half-day cruises five to seven miles off shore , and almost always spot not only the spectacular whales , but also dolphins , harbor seals and sea lions .
 location contains: California, San Diego
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:  California, San Diego 
Answer:
 location contains: California, San Diego