Group 1 - The article discusses the analysis of oil and gas companies, focusing on identifying undervalued firms within the sector [1][2] - The author emphasizes the cyclical nature of the oil and gas industry, highlighting the need for patience and experience in investing [2] - The investing group, Oil & Gas Value Research, seeks out under-followed oil companies and midstream firms that present attractive investment opportunities [2] Group 2 - The article mentions that the analysis includes a breakdown of balance sheets, competitive positions, and development prospects of the companies [1] - The investing group provides a platform for investors to discuss recent information and share ideas in an active chat room [2]