soup.select('div')
All elements named <div>
soup.select('#author')
The element with an id attribute of author
soup.select('.notice')
All elements that use a CSS class attribute named notice
soup.select('div span')
All elements named <span> that are within an element named <div>
soup.select('div > span')
All elements named <span> that are directly within an element named <div>, with no other element in between
soup.select('input[name]')
All elements named <input> that have a name attribute with any value
soup.select('input[type="button"]')
All elements named <input> that have an attribute named type with value button