Question: Lazaretto Creek divides the creek that is 18 miles east of what Georgia city?

Context paragraphs:
Humber Heights – Westmount: Humber Heights-Westmount, also known as Humbervale, is a neighbourhood in Etobicoke, Toronto, Ontario.  The neighbourhood is bounded by the west bank of the Humber River, west to Royal York Road and south to Eglinton Avenue West.  The Humber Creek divides the area into the northern 'Humber Heights' (originally the Etobicoke side of York Township's Weston) and the southern 'Westmount' (originally part of the 'Richview' farming district) centred along Scarlett Road and La Rose Avenue.

Zapato Chino Creek: Zapato Chino Creek formerly known both as Arroyo de Las Polvarduras (Creek of the Dust Clouds) and Arroyo de Zapata Chino (Chinese Shoe Creek), is a creek in Fresno County, California.  Its source is in Zapato Chino Canyon on the east slope of Mustang Peak in the Diablo Range.  From there it runs northwest through Zapato Chino Canyon, in the Krayenhagen Hills, then passed across Pleasant Valley to the Guijarral Hills, then east through the Polvadero Gap, then runs northeast to its confluence with Los Gatos Creek.  It usually dissipates in the San Joaquin Valley, 11 miles east of Coalinga.  However it reaches Los Gatos Creek in years of heavy rainfall.

Tybee Island, Georgia: Tybee Island is a city and barrier island located in Chatham County, Georgia, 18 miles (29 km) east of Savannah, United States.  The name Tybee Island is used for both the city and island.

Elm Creek (Guadalupe County): Elm Creek is the name of two separate streams that rise in Guadalupe County southwest of Seguin in South Central Texas, United States.  The western Elm Creek runs approximately 14 miles from its source about 8.6 miles southwest of Seguin in southwestern Guadalupe County (in the Texas Prairielands), to its confluence with Cibolo Creek, two miles east of La Vernia in Wilson County.  The eastern Elm Creek originates 9.4 miles southwest of Seguin, and proceeds southeast through Guadalupe County, where it discharges into Cottonwood Creek, which itself flows into the Guadalupe River.

Sion Creek: Sion Creek is a creek in central Mumbai near Sion.  The creek divides the city from the suburbs.  It empties out into the Thane Creek to the east.

Gold Pan Creek: Gold Pan Creek is a creek located in the Cassiar Country region of British Columbia.  The creek is a tributary of Little Eagle River about 10 miles east of Dease Lake.  This creek was discovered in the fall of 1925 by two men named Grady and Ford.  Gold was discovered in Gold Pan Creek.  By the end of 1925, there were 165 claims staked on the creek.  Hand sluices were used to mine the creek.

Lazaretto Creek: Lazaretto Creek is a small creek in Chatham County, Georgia.  It divides Tybee Island from McQueens Island.

Cockspur Island: Cockspur Island is an island in the south channel of the Savannah River near Lazaretto Creek, northwest of Tybee Island, Georgia, United States.  Most of the island is within the boundaries of Fort Pulaski National Monument.

Cedar Creek (Missouri River): Cedar Creek is a stream in Boone and Callaway counties of the U.S. state of Missouri.  It is a tributary of the Missouri River.  The headwaters of Cedar Creek are in northeast Boone County about five miles east of Hallsville and one mile west of the Audrain-Boone county line.  The stream flows south and about five miles south of its headwaters the stream becomes the boundary between Boone and Callaway counties.  The stream crosses under Interstate 70 about eight miles east of Columbia and enters the Mark Twain National Forest.  The stream flows south to southwest through the national forest and upon leaving the forest turns to the east and ceases to be the county line.  The stream flows east for about one mile then turns south and flows under U. S. Route 63 and into the Missouri River four miles northwest of Cedar City and across the river from Jefferson City.  The Katy Trail crosses Cedar Creek just north of its confluence with the Missouri.

Spirit Creek: Spirit Creek is a creek located in the Assiniboine River watershed.  It begins near Rama, Saskatchewan generally following a line to the east.  2 miles east of Rama is the Spirit Creek Reservoir, the creek continues east.  At a point 2 miles west of Buchanan the creek turns to the South and crosses Highway 5 and the CN rail line.  It continues south east from the rail line before crossing Highway 754 it then continues to Highway 47 2 miles south of Buchanan.  From there the creek passes through Patterson Lake and finds its mouth at the northernmost end of Good Spirit Lake.

Supporting paragraphs: Lazaretto Creek Tybee Island, Georgia
Answer: Savannah