user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: which locomotives have a class of sncf class cc 6500? 
Knowledge Triplets: Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 47000
Euroduplex, rail.locomotive_class.built_by, Alstom
g.11b6j5j151, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 27300
g.121dpm2h, rail.locomotive_class.built_by, Alstom
JNR Class EH10, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
New South Wales 86 class locomotive, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class CC 6500, rail.locomotive_class.introduced, 1969
Alstom, rail.locomotive_builder.locomotive_classes_built, RENFE Class 120 / 121
Indian Railways WCAM class, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, g.120mhy7y
SNCF Class BB 26000, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.1215cjb8, rail.locomotive_class.built_by, Alstom
DBAG Class 422, rail.locomotive_class.built_by, Alstom
JNR Class EF62, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCB Class 12, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, g.11r_pb9gq
Toei Class E5000, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.121yb3f6, rail.locomotive_class.built_by, Alstom
g.1hc0gzc6d, rail.locomotive_class.built_by, Alstom
ČD Class 680, rail.locomotive_class.built_by, Alstom
JR Freight Class EH500, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, Israel Railways JT 42CW
Alstom, rail.locomotive_builder.locomotive_classes_built, British Rail Class 67
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1hc0hg7pd
Alstom, rail.locomotive_builder.locomotive_classes_built, g.121hfgzr
Alstom, rail.locomotive_builder.locomotive_classes_built, RENFE Class 333
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class CC 72100
Alstom, rail.locomotive_builder.locomotive_classes_built, g.12377c5c
Alstom KZ8A, rail.locomotive_class.built_by, Alstom
SNCF Class BB 17000, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 20005
JNR Class EF64, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, DBAG Class 423
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1hb_g_fsn
SNCB Class 16, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Seibu Class E31, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.120mbr6t, rail.locomotive_class.built_by, Alstom
Israel Railways JT 42CW, rail.locomotive_class.built_by, Alstom
VR Class Dr13, rail.locomotive_class.built_by, Alstom
British Rail Class EE1, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 15000, rail.locomotive_class.built_by, Alstom
TCDD E4000, rail.locomotive_class.built_by, Alstom
SNCB Class 18, rail.locomotive_class.built_by, Alstom
JNR Class EF57, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 37000, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Seibu Class E851, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF BB 20011 and 20012
Alstom, rail.locomotive_builder.locomotive_classes_built, g.11b6svw3jt
NS Class 1700, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, CP Class 9020
DBAG Class 423, rail.locomotive_class.built_by, Alstom
JR Freight Class EF200, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 15000
Alstom, rail.locomotive_builder.locomotive_classes_built, CP Class 1900
NZR EO class, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, CP Class 2600
SNCF Class CC 70000, rail.locomotive_class.built_by, Alstom
JR Freight Class EF210, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCB Class 11, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 25500, rail.locomotive_class.built_by, Alstom
g.122d8b59, rail.locomotive_class.built_by, Alstom
London Underground 1996 Stock, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class Z 6400
Alstom, rail.locomotive_builder.locomotive_classes_built, g.12214t8d
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 8500
g.1222zgzd, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122_4l1f
British Rail Class 76, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
CP Class 1900, rail.locomotive_class.built_by, Alstom
GA DE900 locomotives, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.11b6j5j151
RENFE Class 319, rail.locomotive_class.built_by, Alstom
SNCB Class 13, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 36000
SNCF Class CC 6500, rail.locomotive_class.locomotives_of_this_class, Aquitaine
Alstom, rail.locomotive_builder.locomotive_classes_built, London Underground 1996 Stock
Altéo, rail.locomotive_class.built_by, Alstom
SNCF Class BB 27000, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Milwaukee Road class EF-4 and EP-4, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class Z 22500, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 16500
g.1hb_f0p3m, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122_4l3g
Alstom, rail.locomotive_builder.locomotive_classes_built, g.120vz852
g.1228rqp2, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, DBAG Class 422
CP Class 2600, rail.locomotive_class.built_by, Alstom
Alstom Prima diesel locomotives, rail.locomotive_class.built_by, Alstom
New Zealand EA class locomotive, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.120vz852, rail.locomotive_class.built_by, Alstom
RENFE Class 333, rail.locomotive_class.built_by, Alstom
New Zealand EW class locomotive, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.120x74xz, rail.locomotive_class.built_by, Alstom
SNCF Class CC 6500, rail.locomotive_class.uic_classification, C'C'
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1hb_f0p3m
Civia, rail.locomotive_class.built_by, Alstom
SNCF Class CC 6500, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.122h6n8z, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1215cjb8
Sri Lanka Railways M9, rail.locomotive_class.built_by, Alstom
NS Class 1300, rail.locomotive_class.built_by, Alstom
RENFE Class 276, rail.locomotive_class.built_by, Alstom
SŽ series 363, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1hc0gzc6d
DRG Class ET 171, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCB Class 18
g.1hc0hg7pd, rail.locomotive_class.built_by, Alstom
SNCF Class BB 9200, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 9300, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class CC 65000
g.12214t8d, rail.locomotive_class.built_by, Alstom
Prima, rail.locomotive_class.built_by, Alstom
SNCF Class BB 75000, rail.locomotive_class.built_by, Alstom
NS Class 1300, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class CC 65500
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class CC 7100
Alstom, rail.locomotive_builder.locomotive_classes_built, Alstom Prima diesel locomotives
NS Class 1700, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, g.11h1t8nwj
Alstom, rail.locomotive_builder.locomotive_classes_built, Euroduplex
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 37000
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCB Class 13
JNR Class EF81, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.1hb_d9hvf, rail.locomotive_class.built_by, Alstom
JNR Class EF55, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class X 73500
SNCF Class CC 7100, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.120n80fd
Alstom, rail.locomotive_builder.locomotive_classes_built, SŽ series 363
NS Class 1600, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, Iranian Railways AD43C
SNCF Class X 72500, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1hc0gzc6c
SNCF Class CC 6500, rail.locomotive_class.built_by, Alstom
JNR Class EF63, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
PL42AC, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, AVE Class 100
SNCF Class BB 20005, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122h6n8z
CP Class 2500, rail.locomotive_class.built_by, Alstom
SNCF Class CC 65500, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class Z 23500
Alstom, rail.locomotive_builder.locomotive_classes_built, GA DE900 locomotives
NS Class 1100, rail.locomotive_class.built_by, Alstom
g.1hb_g0f9c, rail.locomotive_class.built_by, Alstom
JR Freight Class EH200, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 8500, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 17000
Alstom, rail.locomotive_builder.locomotive_classes_built, TCDD E4000
Alstom, rail.locomotive_builder.locomotive_classes_built, Israel Railways JT 42BW
SNCB Class 28, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 22200
SNCB Class 25.5, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
British Rail Class EF1, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.122np5q7, rail.locomotive_class.built_by, Alstom
SNCF Class BB 69400, rail.locomotive_class.built_by, Alstom
New South Wales 85 class locomotive, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 25500, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.122_4l1f, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, CP Class 2500
SNCF Class X 73500, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1218f57d
Alstom, rail.locomotive_builder.locomotive_classes_built, Korail Class 8000
CP Class 2550, rail.locomotive_class.built_by, Alstom
SNCF Class BB 8500, rail.locomotive_class.built_by, Alstom
SNCF Class CC 7100, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 10003
JR Freight Class EF510, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class Z 23500, rail.locomotive_class.built_by, Alstom
Korail Class 8000, rail.locomotive_class.built_by, Alstom
SNCF Class BB 26000, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, RENFE Class 276
AVE Class 100, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122d8b59
SNCF BB 20011 and 20012, rail.locomotive_class.built_by, Alstom
CFL Class 3000, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, Alstom KZ8A
SNCF Class BB 27000, rail.locomotive_class.built_by, Alstom
JR Freight Class EF500, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, NS Class 1600
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class CC 70000
SNCF Class BB 22200, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class CC 6500
NZR EC class, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122nc33j
SNCF Class BB 37000, rail.locomotive_class.built_by, Alstom
EP20, rail.locomotive_class.built_by, Alstom
NS Class 1100, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122np5q7
SNCF Class CC 65000, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.120rrf5f
Alstom, rail.locomotive_builder.locomotive_classes_built, EP20
Alstom, rail.locomotive_builder.locomotive_classes_built, CP Class 2550
British Rail Class 77, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 10003, rail.locomotive_class.built_by, Alstom
NS Class 1200, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122_9gdd
JNR Class ED62, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
JNR Class EF66, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SBB-CFF-FFS Am 841, rail.locomotive_class.built_by, Alstom
g.1hc0gzc6c, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 26000
NS Class 1600, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 69400
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class X 72500
SNCF Class BB 20004, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 20004
Alstom, rail.locomotive_builder.locomotive_classes_built, CFL Class 3000
Portuguese train type 9600, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1hb_g0f9c
SNCF Class BB 7200, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, VR Class Dr13
SNCF Class BB 60000, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1222zgzd
g.12377c5c, rail.locomotive_class.built_by, Alstom
Aquitaine, rail.locomotive.locomotive_class, SNCF Class CC 6500
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 75000
g.1218f57d, rail.locomotive_class.built_by, Alstom
Israel Railways JT 42BW, rail.locomotive_class.built_by, Alstom
SNCF Class BB 22200, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 27300, rail.locomotive_class.built_by, Alstom
British Rail Class EB1, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, RENFE Class 319
RENFE Class 120 / 121, rail.locomotive_class.built_by, Alstom
g.122_9gdd, rail.locomotive_class.built_by, Alstom
JNR Class EF58, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122222xn
SNCF Class BB 47000, rail.locomotive_class.built_by, Alstom
SNCB Class 18, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.122_4l3g, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, NS Class 1700
g.11b6svw3jt, rail.locomotive_class.built_by, Alstom
g.121hfgzr, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.120mbr6t
Alstom, rail.locomotive_builder.locomotive_classes_built, g.11b6lk_37w
JNR Class EF65, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
New South Wales 45 (later 71) class locomotive, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.120mhy7y, rail.locomotive_class.built_by, Alstom
British Rail Class 67, rail.locomotive_class.built_by, Alstom
NS Class 1500, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
g.11h1t8nwj, rail.locomotive_class.built_by, Alstom
SNCF Class BB 36000, rail.locomotive_class.built_by, Alstom
g.11r_pb9gq, rail.locomotive_class.built_by, Alstom
g.120n80fd, rail.locomotive_class.built_by, Alstom
SNCF Class BB 27300, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 7200
New South Wales 46 class locomotive, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class BB 7200, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
SNCF Class CC 72100, rail.locomotive_class.built_by, Alstom
g.122nc33j, rail.locomotive_class.built_by, Alstom
g.122222xn, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1hb_d9hvf
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class Z 22500
Alstom, rail.locomotive_builder.locomotive_classes_built, NS Class 1100
SNCF Class BB 16500, rail.locomotive_class.built_by, Alstom
g.11b6lk_37w, rail.locomotive_class.built_by, Alstom
g.120_g181, rail.locomotive_class.built_by, Alstom
MI 2N, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, DRG Class ET 171
SNCB Class 15, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 27000
Alstom, rail.locomotive_builder.locomotive_classes_built, g.1228rqp2
Alstom, rail.locomotive_builder.locomotive_classes_built, g.120_g181
g.1hb_g_fsn, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 60000
JNR Class EF60, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, NS Class 1300
SNCF Class Z 6400, rail.locomotive_class.built_by, Alstom
JR Freight Class ED500, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Iranian Railways AD43C, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, Portuguese train type 9600
CP Class 9020, rail.locomotive_class.built_by, Alstom
g.122gwn3h, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, SBB-CFF-FFS Am 841
Alstom, rail.locomotive_builder.locomotive_classes_built, g.121yb3f6
Alstom, rail.locomotive_builder.locomotive_classes_built, SNCF Class BB 25500
SNCF Class BB 36000, base.train.electric_train_class.electric_system_s, 1500v DC railway electrifacation
Alstom, rail.locomotive_builder.locomotive_classes_built, PL42AC
Alstom, rail.locomotive_builder.locomotive_classes_built, g.122gwn3h
g.120rrf5f, rail.locomotive_class.built_by, Alstom
Alstom, rail.locomotive_builder.locomotive_classes_built, ČD Class 680
Alstom, rail.locomotive_builder.locomotive_classes_built, g.120x74xz
Alstom, rail.locomotive_builder.locomotive_classes_built, g.121dpm2h

Answer: Aquitaine