Solve the following sql problem:
What is the scheduled local departure time and the actual departure time of the flight from Philadelphia to Harrisburg with the plane's tail number N627AE on the 13th of August 2018?

Schema:
SCHEMA:
- Table: Air Carriers
  - Column: Code
    - Samples: [19031, 19032, 19033, 19034, 19035]
  - Column: Description
    - Samples: [Mackey International Inc.: MAC, Munz Northern Airlines Inc.: XY, Cochise Airlines Inc.: COC, Golden Gate Airlines Inc.: GSA, Aeromech Inc.: RZZ]
- Table: Airports
  - Column: Code
    - Samples: [01A, 03A, 04A, 05A, 06A]
  - Column: Description
    - Samples: [Afognak Lake, AK: Afognak Lake Airport, Granite Mountain, AK: Bear Creek Mining Strip, Lik, AK: Lik Mining Camp, Little Squaw, AK: Little Squaw Airport, Kizhuyak, AK: Kizhuyak Bay]
- Table: Airlines
  - Column: FL_DATE
    - Samples: [2018/8/1, 2018/8/1, 2018/8/1, 2018/8/1, 2018/8/1]
  - Column: OP_CARRIER_AIRLINE_ID
    - Samples: [19805, 19805, 19805, 19805, 19805]
  - Column: TAIL_NUM
    - Samples: [N956AN, N973AN, N9006, N870NN, N9023N]
  - Column: OP_CARRIER_FL_NUM
    - Samples: [1587, 1588, 1590, 1591, 1593]
  - Column: ORIGIN_AIRPORT_ID
    - Samples: [12478, 14107, 11042, 14843, 10423]
  - Column: ORIGIN_AIRPORT_SEQ_ID
    - Samples: [1247805, 1410702, 1104205, 1484306, 1042302]
  - Column: ORIGIN_CITY_MARKET_ID
    - Samples: [31703, 30466, 30647, 34819, 30423]
  - Column: ORIGIN
    - Samples: [JFK, PHX, CLE, SJU, AUS]
  - Column: DEST_AIRPORT_ID
    - Samples: [14107, 11618, 11298, 11298, 13303]
  - Column: DEST_AIRPORT_SEQ_ID
    - Samples: [1410702, 1161802, 1129806, 1129806, 1330303]
  - Column: DEST_CITY_MARKET_ID
    - Samples: [30466, 31703, 30194, 30194, 32467]
  - Column: DEST
    - Samples: [PHX, EWR, DFW, DFW, MIA]
  - Column: CRS_DEP_TIME
    - Samples: [1640, 1512, 744, 900, 600]
  - Column: DEP_TIME
    - Samples: [1649, 1541, 741, 944, 556]
  - Column: DEP_DELAY
    - Samples: [9, 29, -3, 44, -4]
  - Column: DEP_DELAY_NEW
    - Samples: [9, 29, 0, 44, 0]
  - Column: ARR_TIME
    - Samples: [2006, 2350, 938, 1347, 951]
  - Column: ARR_DELAY
    - Samples: [44, 53, -2, 43, -2]
  - Column: ARR_DELAY_NEW
    - Samples: [44, 53, 0, 43, 0]
  - Column: CANCELLED
    - Samples: [0, 0, 0, 0, 0]
  - Column: CANCELLATION_CODE
    - Samples: [None, None, None, None, None]
  - Column: CRS_ELAPSED_TIME
    - Samples: [342, 285, 176, 304, 173]
  - Column: ACTUAL_ELAPSED_TIME
    - Samples: [377, 309, 177, 303, 175]
  - Column: CARRIER_DELAY
    - Samples: [9, 0, None, 43, None]
  - Column: WEATHER_DELAY
    - Samples: [0, 0, None, 0, None]
  - Column: NAS_DELAY
    - Samples: [35, 53, None, 0, None]
  - Column: SECURITY_DELAY
    - Samples: [0, 0, None, 0, None]
  - Column: LATE_AIRCRAFT_DELAY
    - Samples: [0, 0, None, 0, None]

SELECT CRS_DEP_TIME, DEP_TIME FROM Airlines WHERE ORIGIN = 'PHL' AND DEST = 'MDT' AND TAIL_NUM = 'N627AE' AND FL_DATE = '2018/8/13'