content: import dash
  from dash import html
  
  dash.register_page(__name__, id="query_string")
  
  
  def layout(velocity=None, **other_unknown_query_strings):
      return html.Div(
          [
              html.Div("text for query_string", id="text_query_string"),
              dash.dcc.Input(id="velocity", value=velocity),
          ]
      )
  