In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).
Q: Context: A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common censuses include agriculture, business, and traffic censuses. The United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory, simultaneity and defined periodicity", and recommends that population censuses be taken at least every 10 years. United Nations recommendations also cover census topics to be collected, official definitions, classifications and other useful information to co-ordinate international practice., Pescadero Creek is a major stream in Santa Cruz and San Mateo counties in California. At , it is the longest stream in San Mateo County and flows all year from springs in the Santa Cruz Mountains. Its source is at above sea level on the western edge of Castle Rock State Park, with additional headwaters in Portola Redwoods State Park, and its course traverses Pescadero Creek County Park and San Mateo County Memorial Park before entering Pescadero Marsh Natural Preserve at Pescadero State Beach and thence to the Pacific Ocean south of Half Moon Bay., Pescadero State Beach (meaning "the place to fish" in Spanish) is alongside State Route 1, located 14.5 miles south of Half Moon Bay and 1.5 miles west of the city of Pescadero in San Mateo County, California., A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is used in the United States, Canada, Romania, China and Taiwan. In the United Kingdom and Ireland, county towns have a similar function., Bloomquist Creek is a stream in San Mateo County , California and is a tributary of Pescadero Creek . It enters Pescadero Creek within the boundaries of Memorial Park ., San Mateo County (; Spanish for "Saint Matthew") is a county located in the U.S. state of California. As of the 2010 census, the population was 718,451. The county seat is Redwood City., Portola Redwoods State Park is a California state park, located in San Mateo County. Peters Creek and Pescadero Creek meet in Portola, and are the park's primary watercourses, and feature numerous tributaries. Tip Toe Falls is a small waterfall along Fall Creek, a tributary of Pescadero Creek. 
Portola Redwoods State Park contains approximately 18 miles of hiking trails in the 2,800-acre park, a small car-camping campground of about 50 campsites, four group campsites, and 6 trail sites at Slate Creek Trail Camp. Portola Redwoods State Park is also home to the site of Page shingle Mill, for which the Palo Alto road is named., The Santa Cruz Mountains, part of the Pacific Coast Ranges, are a mountain range in central and northern California, United States. They form a ridge along the San Francisco Peninsula, south of San Francisco, separating the Pacific Ocean from San Francisco Bay and the Santa Clara Valley, and continuing south to the central coast , bordering Monterey Bay and ending at the Salinas Valley. The range passes through San Mateo, Santa Clara and Santa Cruz counties, with the Pajaro River forming the southern boundary., A U.S. state is a constituent political entity of the United States of America. There are 50 states, which are bound together in a union with each other. Each state holds administrative jurisdiction over a defined geographic territory, and shares its sovereignty with the United States federal government. Due to the shared sovereignty between each state and the federal government, Americans are citizens of both the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons covered by certain types of court orders (e.g., paroled convicts and children of divorced spouses who are sharing custody)., California is the most populous state in the United States and the third most extensive by area. Located on the western (Pacific Ocean) coast of the U.S., California is bordered by the other U.S. states of Oregon, Nevada, and Arizona and shares an international border with the Mexican state of Baja California. The state capital is Sacramento. Los Angeles is California's most populous city, and the country's second largest after New York City. The state also has the nation's most populous county, Los Angeles County, and its largest county by area, San Bernardino County., Subject: bloomquist creek, Relation: instance_of, Options: (A) 1 (B) agriculture (C) bay (D) beach (E) border (F) castle (G) census (H) city (I) coast (J) country (K) county (L) county park (M) county seat (N) enumeration (O) feature (P) federal government (Q) federal republic (R) government (S) information (T) jurisdiction (U) los angeles (V) memorial (W) mountain (X) mountain range (Y) ocean (Z) pacific coast ranges ([) part (\) peninsula (]) population (^) range (_) republic (`) ridge (a) river (b) rock (c) route (d) saint (e) sea (f) seat (g) sharing (h) state (i) state park (j) stream (k) territory (l) trail (m) tributary (n) valley (o) year
A:
river