css - SASS throws an error for BEM syntax -

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I'm just trying to use "modifier" and "element" BEM syntax in SASS. 

  .second-title {background-color: green; & Amp; - touched {background-color: black; } & Amp; __ left {background color: red; }}   
 The CSS file is compiled correctly but when I try to run "Huffy Service" throws the following error:  
  Syntax error: \ "& Amp; - \" after invalid css: Expected number or function, \ "- Touched {\" \ A on D: / webdev / angularjs / ang-snapscan / app / styles / mobilestyle.scss "   
 
 
 In order to use the parent selector in this way, You must use Sass 3.3:  
  
 if If you are stuck using the old version, you can try it:  
  $ Module: 'second title'; .second-title {# {$ Module} - touch {background -color: black;}. # {$ Module} __ left {background-color: red;}

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