Question: In which city is the suburb partially included in the electoral district of Elder?

Context paragraphs:
Colombo Central Electoral District: Colombo Central electoral district was an electoral district of Sri Lanka between August 1947 and February 1989.  The district was named after the city of Colombo in Colombo District, Western Province.  The district was a three-member constituency.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Colombo Central electoral district was replaced by the Colombo multi-member electoral district at the 1989 general elections, the first under the PR system, though Colombo Central continues to be a polling division of the multi-member electoral district.

Batticaloa Electoral District (1947–1989): Batticaloa Electoral District was an electoral district of Sri Lanka between August 1947 and February 1989.  The district was named after the city of Batticaloa in Batticaloa District, Eastern Province.  The district was a two-member constituency between March 1960 and February 1989.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Batticaloa electoral district was replaced by the Batticaloa multi-member electoral district at the 1989 general elections, the first under the PR system, though Batticaloa continues to be a polling division of the multi-member electoral district.

Colonel Light Gardens, South Australia: Colonel Light Gardens is a suburb located within the City of Mitcham in the greater Adelaide region.  The area is 1.58 km².  It is known for featuring wide, tree-lined streets, presentable postwar bungalow homes, rounded street corners, and lots of manicured, well maintained open space.

Gampaha Electoral District (1947–1989): Gampaha electoral district was an electoral district of Sri Lanka between August 1947 and February 1989.  The district was named after the city of Gampaha in present-day Gampaha District, Western Province.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Gampaha electoral district was replaced by the Gampaha multi-member electoral district at the 1989 general elections, the first under the PR system, though Gampaha continues to be a polling division of the multi-member electoral district.

Electoral district of Elder: Elder is an electoral district of the House of Assembly in the Australian state of South Australia.  It is named after nineteenth-century businessman and philanthropist Thomas Elder.  Elder is a 15.7 km² urban electorate in Adelaide's south-west, taking in the suburbs of Ascot Park, Clovelly Park, Marion, Melrose Park, Mitchell Park and Park Holme, and parts of Colonel Light Gardens, Daw Park, Edwardstown, Oaklands Park, Plympton Park, South Plympton and Warradale.

Colombo East Electoral District: Colombo East electoral district was an electoral district of Sri Lanka between July 1977 and February 1989.  The district was named after the city of Colombo in Colombo District, Western Province.  The district was created by the division of the Colombo South Electoral District into Colombo East and Colombo West electoral districts in July 1977.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Colombo East electoral district was replaced by the Colombo multi-member electoral district at the 1989 general elections, the first under the PR system, though Colombo East continues to be a polling division of the multi-member electoral district.

Moratuwa Electoral District: Moratuwa electoral district was an electoral district of Sri Lanka between August 1947 and February 1989.  The district was named after the city of Moratuwa in Colombo District, Western Province.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Moratuwa electoral district was replaced by the Colombo multi-member electoral district at the 1989 general elections, the first under the PR system, though Moratuwa continues to be a polling division of the multi-member electoral district.

Colombo West Electoral District: Colombo West electoral district was an electoral district of Sri Lanka between July 1977 and February 1989.  The district was named after the city of Colombo in Colombo District, Western Province.  The district was created by the division of the Colombo South Electoral District into Colombo East and Colombo West electoral districts in July 1977.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Colombo West electoral district was replaced by the Colombo multi-member electoral district at the 1989 general elections, the first under the PR system, though Colombo West continues to be a polling division of the multi-member electoral district.

Colombo North Electoral District: Colombo North electoral district was an electoral district of Sri Lanka between August 1947 and February 1989.  The district was named after the city of Colombo in Colombo District, Western Province.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Colombo North electoral district was replaced by the Colombo multi-member electoral district at the 1989 general elections, the first under the PR system, though Colombo North continues to be a polling division of the multi-member electoral district.

Trincomalee Electoral District (1947–1989): Trincomalee electoral district was an electoral district of Sri Lanka between August 1947 and February 1989.  The district was named after the city of Trincomalee in Trincomalee District, Eastern Province.  The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament.  The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Trincomalee electoral district was replaced by the Trincomalee multi-member electoral district at the 1989 general elections, the first under the PR system, though Trincomalee continues to be a polling division of the multi-member electoral district.

Supporting paragraphs: Electoral district of Elder Colonel Light Gardens, South Australia
Answer: Mitcham