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: a focal length of sraw 2 is attributed to what digital camera? 
Knowledge Triplets: Canon EOS 5D Mark II, base.digitalcameras.digital_camera.lens_mount, Canon EF lens mount
Canon EOS 50D, digicams.digital_camera.supported_resolutions, m.04wj_6r
Canon EOS 50D, digicams.digital_camera.supported_storage_types, Compact Flash (Type I)
1/8000, base.digitalcameras.shutter_speed.cameras, Canon EOS 50D
3200, digicams.camera_iso.cameras, Canon EOS 50D
Canon EOS 50D, business.consumer_product.company, m.05ndyzl
sRAW 2, digicams.camera_uncompressed_format.cameras, Canon EOS 50D
2000, digicams.camera_iso.cameras, Canon EOS 5D Mark II
12800, digicams.camera_iso.cameras, Canon EOS 50D
Canon EOS 5D Mark II, digicams.digital_camera.format, Digital SLR
Canon EOS 5D Mark II, digicams.digital_camera.sensor_size, m.04wjz6n
Canon EOS 5D Mark II, digicams.digital_camera.sensor_type, CMOS sensor
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 50
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 800
Canon EOS 5D Mark II, user.avh.default_domain.ellerdale_topic.ellerdale_id, 0095-8387
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.image_stabilization, Not Available
Canon EOS 50D, base.digitalcameras.digital_camera.lens_mount, Canon EF-S lens mount
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.video_recording, true
Canon EOS 50D, digicams.digital_camera.iso_setting, 400
Canon EOS 5D Mark II, digicams.digital_camera.weight, 850.0
Canon EOS 50D, digicams.digital_camera.iso_setting, 1600
Canon EOS 50D, digicams.digital_camera.lcd_pixels, 920000.0
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 1200
400, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 50D, base.digitalcameras.digital_camera.aperture_priority, true
130, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.supported_storage_types, Compact Flash (Type II)
Canon EOS 50D, base.digitalcameras.digital_camera.slowest_shutter, 30
Canon EOS 5D Mark II, digicams.digital_camera.uncompressed_formats, sRAW 1
1000, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 5D Mark II, digicams.digital_camera.dimensions, m.04wjj61
320, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 5D Mark II, business.consumer_product.company, m.06_96g1
Canon EF-S lens mount, base.digitalcameras.lens_mount.digital_cameras, Canon EOS 50D
Canon EOS 50D, base.digitalcameras.digital_camera.focal_length_multiplier, 1.6
30, base.digitalcameras.shutter_speed.cameras_slowest, Canon EOS 5D Mark II
1/8000, base.digitalcameras.shutter_speed.cameras, Canon EOS 5D Mark II
800, digicams.camera_iso.cameras, Canon EOS 50D
Canon Inc., digicams.digital_camera_manufacturer.cameras, Canon EOS 5D Mark II
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.aperture_priority, true
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 3200
Canon EOS 50D, digicams.digital_camera.supported_resolutions, m.04ll7_n
Canon EOS 5D Mark II, digicams.digital_camera.supported_resolutions, m.04wjz7g
Compact Flash (Type I), digicams.camera_storage_type.compatible_cameras, Canon EOS 50D
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.slowest_shutter, 30
Canon EOS 50D, digicams.digital_camera.supported_storage_types, UDMA
m.06_96g1, business.company_product_relationship.consumer_product, Canon EOS 5D Mark II
Canon EOS 5D Mark II, digicams.digital_camera.supported_storage_types, UDMA
400, digicams.camera_iso.cameras, Canon EOS 50D
Canon EOS 50D, digicams.digital_camera.supported_resolutions, m.04ll7_8
Canon EOS 5D Mark II, digicams.digital_camera.supported_resolutions, m.04wjz78
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 12800
Canon EOS 50D, digicams.digital_camera.iso_setting, 12800
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 130
Canon EOS 50D, digicams.digital_camera.effective_resolution, 15.1
Microdrive, digicams.camera_storage_type.compatible_cameras, Canon EOS 5D Mark II
Canon EOS 50D, base.digitalcameras.digital_camera.image_stabilization, With IS-Compatible Lenses
Canon EOS 50D, digicams.digital_camera.supported_resolutions, m.04ll7_2
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 1000
Canon EOS 50D, base.digitalcameras.digital_camera.video_recording, false
Canon EOS 50D, base.digitalcameras.digital_camera.shutter_priority, true
Canon EOS 50D, digicams.digital_camera.sensor_type, CMOS sensor
3200, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.orientation_sensor, true
Canon EOS 50D, digicams.digital_camera.weight, 730.0
50, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Optical, digicams.camera_viewfinder_type.digital_cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.image_ratio, 3:2
100, digicams.camera_iso.cameras, Canon EOS 50D
Canon EOS 50D, digicams.digital_camera.sensor_resolution, 15.5
Canon EOS 50D, digicams.digital_camera.iso_setting, 100
Compact Flash (Type II), digicams.camera_storage_type.compatible_cameras, Canon EOS 50D
Canon EOS 5D Mark II, digicams.digital_camera.effective_resolution, 21.0
Canon EOS 50D, digicams.digital_camera.uncompressed_formats, sRAW 1
Canon EOS 5D Mark II, digicams.digital_camera.viewfinder_type, Optical
Canon EOS 50D, base.digitalcameras.digital_camera.fastest_shutter, 1/8000
CMOS sensor, digicams.camera_sensor_type.digital_cameras, Canon EOS 50D
sRAW 1, digicams.camera_uncompressed_format.cameras, Canon EOS 50D
Canon EOS 50D, digicams.digital_camera.compressed_formats, JPEG (EXIF 2.21)
120, digicams.camera_iso.cameras, Canon EOS 5D Mark II
JPEG (EXIF 2.21), digicams.camera_compressed_format.cameras, Canon EOS 50D
Canon EOS 5D Mark II, digicams.digital_camera.uncompressed_formats, Raw image format
Canon EOS 5D Mark II, digicams.digital_camera.lcd_pixels, 920000.0
Canon EOS 50D, base.digitalcameras.digital_camera.burst_capability, 6.3
Canon EOS 50D, digicams.digital_camera.manufacturer, Canon Inc.
Canon EOS 5D Mark II, digicams.digital_camera.sensor_resolution, 22.0
Canon EOS 5D Mark II, digicams.digital_camera.supported_storage_types, Compact Flash (Type I)
CompactFlash, digicams.camera_storage_type.compatible_cameras, Canon EOS 5D Mark II
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 100
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.burst_capability, 3.9
Canon EOS 5D Mark II, digicams.digital_camera.supported_resolutions, m.04wjz72
Canon EOS 50D, digicams.digital_camera.iso_setting, Auto
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 1600
CompactFlash, digicams.camera_storage_type.compatible_cameras, Canon EOS 50D
30, base.digitalcameras.shutter_speed.cameras_slowest, Canon EOS 50D
sRAW 2, digicams.camera_uncompressed_format.cameras, Canon EOS 5D Mark II
sRAW 2, digicams.digital_camera.uncompressed_formats, Canon EOS 5D Mark II
6400, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 50D, user.avh.default_domain.ellerdale_topic.ellerdale_id, 0096-d483
sRAW 1, digicams.camera_uncompressed_format.cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.iso_setting, 3200
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.aspect_ratio, m.04wjz6x
Canon EOS 50D, digicams.digital_camera.iso_setting, 800
Canon EOS 50D, digicams.digital_camera.iso_setting, 200
12800, digicams.camera_iso.cameras, Canon EOS 5D Mark II
6400, digicams.camera_iso.cameras, Canon EOS 50D
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.fastest_shutter, 1/8000
Canon EOS 50D, digicams.digital_camera.supported_storage_types, CompactFlash
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 2000
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 400
Digital SLR, digicams.camera_format.cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.lcd_screen_dimensions, 7.62
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 120
Canon EOS 50D, digicams.digital_camera.uncompressed_formats, sRAW 2
Canon EOS 50D, digicams.digital_camera.dimensions, m.04ll8h4
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 200
Raw image format, digicams.camera_uncompressed_format.cameras, Canon EOS 50D
Auto, digicams.camera_iso.cameras, Canon EOS 50D
Canon EOS 50D, digicams.digital_camera.viewfinder_type, Optical
m.05ndyzl, business.company_product_relationship.consumer_product, Canon EOS 50D
200, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Raw image format, digicams.camera_uncompressed_format.cameras, Canon EOS 5D Mark II
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.focal_length_multiplier, 1.0
Canon EOS 50D, digicams.digital_camera.supported_resolutions, m.04ll7zx
Canon EOS 5D Mark II, digicams.digital_camera.manufacturer, Canon Inc.
Canon EOS 5D Mark II, digicams.digital_camera.orientation_sensor, true
Canon EOS 5D Mark II, digicams.digital_camera.dpreview_detail_id, Canon$002Fcanon_eos5dmkii
Canon EOS 5D Mark II, digicams.digital_camera.supported_resolutions, m.04wjz7n
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 6400
Canon EOS 50D, digicams.digital_camera.supported_resolutions, m.04ll7_g
800, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon Inc., digicams.digital_camera_manufacturer.cameras, Canon EOS 50D
CMOS sensor, digicams.camera_sensor_type.digital_cameras, Canon EOS 5D Mark II
Canon EOS 5D Mark II, digicams.digital_camera.lcd_screen_dimensions, 7.62
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 320
Canon EOS 50D, digicams.digital_camera.street_price, m.04ll7yz
Canon EOS 5D Mark II, digicams.digital_camera.supported_storage_types, CompactFlash
Canon EOS 50D, digicams.digital_camera.format, Digital SLR
Optical, digicams.camera_viewfinder_type.digital_cameras, Canon EOS 50D
1600, digicams.camera_iso.cameras, Canon EOS 5D Mark II
UDMA, digicams.camera_storage_type.compatible_cameras, Canon EOS 5D Mark II
Canon EOS 50D, base.digitalcameras.digital_camera.aspect_ratio, m.04vb1rm
Canon EF lens mount, base.digitalcameras.lens_mount.digital_cameras, Canon EOS 5D Mark II
Digital SLR, digicams.camera_format.cameras, Canon EOS 50D
Canon EOS 50D, digicams.digital_camera.dpreview_detail_id, Canon$002Fcanon_eos50d
Canon EOS 5D Mark II, digicams.digital_camera.supported_storage_types, Microdrive
3:2, digicams.camera_image_ratio.cameras, Canon EOS 50D
160, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.sensor_size, m.04ll81q
Canon EOS 5D Mark II, digicams.digital_camera.supported_storage_types, Compact Flash (Type II)
m.0v47j3n, dataworld.gardening_hint.last_referenced_by, Canon EOS 50D
Canon EOS 5D Mark II, base.digitalcameras.digital_camera.shutter_priority, true
1600, digicams.camera_iso.cameras, Canon EOS 50D
sRAW 2, digicams.digital_camera.uncompressed_formats, Canon EOS 50D
200, digicams.camera_iso.cameras, Canon EOS 50D
m.07c_tvf, base.yupgrade.user.topics, Canon EOS 5D Mark II
Canon EOS 5D Mark II, digicams.digital_camera.iso_setting, 160
Compact Flash (Type II), digicams.camera_storage_type.compatible_cameras, Canon EOS 5D Mark II
100, digicams.camera_iso.cameras, Canon EOS 5D Mark II
UDMA, digicams.camera_storage_type.compatible_cameras, Canon EOS 50D
Compact Flash (Type I), digicams.camera_storage_type.compatible_cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.iso_setting, 6400
Canon EOS 5D Mark II, digicams.digital_camera.uncompressed_formats, sRAW 2
1200, digicams.camera_iso.cameras, Canon EOS 5D Mark II
Canon EOS 50D, digicams.digital_camera.uncompressed_formats, Raw image format

Answer: Canon EOS 50D
Canon EOS 5D Mark II