question: Does the London Avenue Canal or  Riverside Canal run through the 4th ward?
answer: London Avenue Canal
context: Title: London Avenue Canal
  Passage: The London Avenue Canal is a drainage canal in New Orleans, Louisiana, used for pumping rain water into Lake Pontchartrain.  The Canal runs through the 7th Ward of New Orleans from the Gentilly area to the Lakefront.  It is one of the three main drainage canals responsible for draining rainwater from the main basin of the city of New Orleans.  The London Avenue Canal's flood walls built atop earthen levees breached on both sides during Hurricane Katrina in 2005.
  Title: Riverside Canal (El Paso)
  Passage: The Riverside Canal is an irrigation canal in El Paso County beginning southeast of El Paso, Texas.  The canal acquires water from the Riverside Diversion Dam on the Rio Grande 15 mi southeast of El Paso.  The canal is managed by the US Bureau of Reclamation.  The canal extends for 17.2 mi with a capacity of 900 cubic feet per second.  Water from the canal irrigates about 39,000 acres (160 km²).  The canal and diversion dam is the southernmost system on an irrigation project extending along the Rio Grande in New Mexico and Texas.  The canal supplies a canal network extending throughout the Upper Rio Grande Valley.
  Title: 17th Street Canal
  Passage: The 17th Street Canal is the largest and most important drainage canal in the city of New Orleans.  Operating with Pump Station 6, It moves water into Lake Pontchartrain.  The canal, along with the Orleans Canal and the London Avenue Canal, form the New Orleans Outfall Canals.  The 17th Street Canal forms a significant portion of the boundary between the city of New Orleans and Metairie, Louisiana.  The canal has also been known as the Metairie Outlet Canal and the Upperline Canal.
  Title: 16th Ward of New Orleans
  Passage: The 16th Ward or Sixteenth Ward is a division of the city of New Orleans, Louisiana, one of the 17 Wards of New Orleans.  New Orleans Districts and Wards.  It is an Uptown ward, along with the adjacent 17th Ward formerly part of the city of Carrollton, Louisiana, annexed by New Orleans in the 1870s.  The Ward stretches inland from the Mississippi River, with the upper boundary being Carrollton Avenue, across which is the 17th Ward, and the lower being Lowerline Street, across which is the 14th Ward.  The back boundary was the New Basin Canal, now part of the route of I-10.
citations: London Avenue Canal Riverside Canal (El Paso)